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C++ visual studios 2012 gui

kgcsinister7 (13)
I am currently starting to learn some gui in c++. I use Visual Studios Express 2012. I have a program I am gonna work on converting from cli to gui and am having some troubles, I was working on the main menu window with 6 buttons and as VS does, it was writing code for me. I went to test how it looks when i debug and it gave me 2 errors on the code that VS wrote itself. here are the files i have to this program so far

MyForm.h:
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#pragma once

namespace Math {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for MyForm
	/// </summary>
	public ref class MyForm : public System::Windows::Forms::Form
	{
	public:
		MyForm(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~MyForm()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Label^  label1;
	protected: 
	private: System::Windows::Forms::Button^  button1;
	private: System::Windows::Forms::Button^  button2;
	private: System::Windows::Forms::Button^  button3;
	private: System::Windows::Forms::Button^  button4;
	private: System::Windows::Forms::Button^  button5;
	private: System::Windows::Forms::Button^  button6;






	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->button2 = (gcnew System::Windows::Forms::Button());
			this->button3 = (gcnew System::Windows::Forms::Button());
			this->button4 = (gcnew System::Windows::Forms::Button());
			this->button5 = (gcnew System::Windows::Forms::Button());
			this->button6 = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(33, 20);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(217, 13);
			this->label1->TabIndex = 0;
			this->label1->Text = L"Please choose the function you want to use.";
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(36, 83);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(89, 36);
			this->button1->TabIndex = 1;
			this->button1->Text = L"Simple Calculator";
			this->button1->UseVisualStyleBackColor = true;
			this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
			// 
			// button2
			// 
			this->button2->Location = System::Drawing::Point(36, 137);
			this->button2->Name = L"button2";
			this->button2->Size = System::Drawing::Size(89, 36);
			this->button2->TabIndex = 2;
			this->button2->Text = L"Square Root Calculator";
			this->button2->UseVisualStyleBackColor = true;
			this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
			// 
			// button3
			// 
			this->button3->Location = System::Drawing::Point(36, 192);
			this->button3->Name = L"button3";
			this->button3->Size = System::Drawing::Size(89, 36);
			this->button3->TabIndex = 3;
			this->button3->Text = L"Factorial Calculator";
			this->button3->UseVisualStyleBackColor = true;
			this->button3->Click += gcnew System::EventHandler(this, &MyForm::button3_Click);
			// 
			// button4
			// 
			this->button4->Location = System::Drawing::Point(161, 83);
			this->button4->Name = L"button4";
			this->button4->Size = System::Drawing::Size(89, 36);
			this->button4->TabIndex = 4;
			this->button4->Text = L"Find Equation of a Line";
			this->button4->UseVisualStyleBackColor = true;
			this->button4->Click += gcnew System::EventHandler(this, &MyForm::button4_Click);
			// 
			// button5
			// 
			this->button5->Location = System::Drawing::Point(161, 137);
			this->button5->Name = L"button5";
			this->button5->Size = System::Drawing::Size(89, 36);
			this->button5->TabIndex = 5;
			this->button5->Text = L"Quadratics";
			this->button5->UseVisualStyleBackColor = true;
			this->button5->Click += gcnew System::EventHandler(this, &MyForm::button5_Click);
			// 
			// button6
			// 
			this->button6->Location = System::Drawing::Point(161, 192);
			this->button6->Name = L"button6";
			this->button6->Size = System::Drawing::Size(89, 36);
			this->button6->TabIndex = 6;
			this->button6->Text = L"Line Equation Solver";
			this->button6->UseVisualStyleBackColor = true;
			this->button6->Click += gcnew System::EventHandler(this, &MyForm::button6_Click);
			// 
			// MyForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(284, 262);
			this->Controls->Add(this->button6);
			this->Controls->Add(this->button5);
			this->Controls->Add(this->button4);
			this->Controls->Add(this->button3);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->button1);
			this->Controls->Add(this->label1);
			this->Name = L"MyForm";
			this->Text = L"Math";
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e)
		 {
		 }
private: System::Void button3_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button5_Click(System::Object^  sender, System::EventArgs^  e)
		 {
		 }
private: System::Void button6_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
};
}


main.cpp:

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#include <iostream>
#include "MyForm.h"

using namespace std;

float addition(int x, int y);
float subtraction(int x, int y);
float multiply(int x, int y);
float divide(int x, int y);
float squareroot(int x);
float exponent(int x, int y);
float factorial(int x);

int main()
{
	float x;
	float y;

	return 0;

}


and heres the errors:
Error 1 error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup C:\Users\Greg\Documents\Visual Studio 2012\Projects\Math\Math\MSVCRTD.lib(crtexew.obj) Math

Error 2 error LNK1120: 1 unresolved externals C:\Users\Greg\Documents\Visual Studio 2012\Projects\Math\Debug\Math.exe 1 1 Math

I am working on fixing it, but for some reason I can't figure it out... just thought i could maybe get a second opinion on it
Last edited on
coder777 (8439)
This means usually that you chose the wrong project type.

Better choose one of the CLR projects
kgcsinister7 (13)
ok I changed to a CLR project and was testing it out simple and got this error:
Error 1 error LNK1561: entry point must be defined C:\Users\Greg\Documents\Visual Studio 2012\Projects\Project2\Project2\LINK Project2

and this is my file:
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#pragma once

namespace Project2 {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for MyForm
	/// </summary>
	public ref class MyForm : public System::Windows::Forms::Form
	{
	public:
		MyForm(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~MyForm()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  button1;
	protected: 
	private: System::Windows::Forms::Label^  label1;
	private: System::Windows::Forms::TextBox^  textBox1;
	private: System::Windows::Forms::TextBox^  textBox2;
	private: System::Windows::Forms::Label^  label2;

	private: System::Windows::Forms::Button^  button2;
	private: System::Windows::Forms::Button^  button3;
	private: System::Windows::Forms::Button^  button4;
	private: System::Windows::Forms::Button^  button5;

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->textBox1 = (gcnew System::Windows::Forms::TextBox());
			this->textBox2 = (gcnew System::Windows::Forms::TextBox());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->button2 = (gcnew System::Windows::Forms::Button());
			this->button3 = (gcnew System::Windows::Forms::Button());
			this->button4 = (gcnew System::Windows::Forms::Button());
			this->button5 = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(12, 151);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(75, 23);
			this->button1->TabIndex = 0;
			this->button1->Text = L"+";
			this->button1->UseVisualStyleBackColor = true;
			this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(120, 33);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(0, 13);
			this->label1->TabIndex = 1;
			// 
			// textBox1
			// 
			this->textBox1->Location = System::Drawing::Point(12, 12);
			this->textBox1->Name = L"textBox1";
			this->textBox1->Size = System::Drawing::Size(260, 20);
			this->textBox1->TabIndex = 2;
			// 
			// textBox2
			// 
			this->textBox2->Location = System::Drawing::Point(12, 49);
			this->textBox2->Name = L"textBox2";
			this->textBox2->Size = System::Drawing::Size(260, 20);
			this->textBox2->TabIndex = 3;
			// 
			// label2
			// 
			this->label2->AutoSize = true;
			this->label2->Location = System::Drawing::Point(120, 112);
			this->label2->Name = L"label2";
			this->label2->Size = System::Drawing::Size(0, 13);
			this->label2->TabIndex = 4;
			// 
			// button2
			// 
			this->button2->Location = System::Drawing::Point(93, 151);
			this->button2->Name = L"button2";
			this->button2->Size = System::Drawing::Size(75, 23);
			this->button2->TabIndex = 6;
			this->button2->Text = L"-";
			this->button2->UseVisualStyleBackColor = true;
			this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
			// 
			// button3
			// 
			this->button3->Location = System::Drawing::Point(174, 151);
			this->button3->Name = L"button3";
			this->button3->Size = System::Drawing::Size(75, 23);
			this->button3->TabIndex = 7;
			this->button3->Text = L"X";
			this->button3->UseVisualStyleBackColor = true;
			this->button3->Click += gcnew System::EventHandler(this, &MyForm::button3_Click);
			// 
			// button4
			// 
			this->button4->Location = System::Drawing::Point(12, 196);
			this->button4->Name = L"button4";
			this->button4->Size = System::Drawing::Size(75, 23);
			this->button4->TabIndex = 8;
			this->button4->Text = L"/";
			this->button4->UseVisualStyleBackColor = true;
			this->button4->Click += gcnew System::EventHandler(this, &MyForm::button4_Click);
			// 
			// button5
			// 
			this->button5->Location = System::Drawing::Point(102, 75);
			this->button5->Name = L"button5";
			this->button5->Size = System::Drawing::Size(75, 23);
			this->button5->TabIndex = 9;
			this->button5->Text = L"=";
			this->button5->UseVisualStyleBackColor = true;
			this->button5->Click += gcnew System::EventHandler(this, &MyForm::button5_Click);
			// 
			// MyForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(284, 262);
			this->Controls->Add(this->button5);
			this->Controls->Add(this->button4);
			this->Controls->Add(this->button3);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->textBox2);
			this->Controls->Add(this->textBox1);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->button1);
			this->Name = L"MyForm";
			this->Text = L"Calculator";
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button3_Click(System::Object^  sender, System::EventArgs^  e)
		 {
		 }
private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
private: System::Void button5_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
		 }
};
}


not sure where its at or what needs defined really
coder777 (8439)
I suggest that you make a whole new project, compile it, and then add your stuff
modoran (2077)
kgcsinister7 wrote:
I am currently starting to learn some gui in c++


Then you are very far away, as your posted code has nothing in common with C++ programming language, it is a propietary Microsoft language called C++/CLI.
bobdabilder (87)
Are you trying to make this work in c++/cli or in win32 (api) ? If u want to convert this to win32 you will need to open a new project and start adding your buttons and functions. It is not as simple as c++/cli. If u are staying with c++/cli then i can help u with it.
kgcsinister7 (13)
its win32 api its a form and added all the buttons and everything already but I got an error that was in the "LINK" file that is hidden to me in the project folder that the IDE made (MS Visual Studios 2012)
modoran (2077)
A 'form' is used only by c++/cli, you are not using win32api.
You don't have any idea what you are doing, do you ?

LINK is not a hidden file, it is the linker itself, that means you have a linker error.

Btw, do you know what a linker is ?
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