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Help with errors! Please Help Me!

Willmannn (23)
Hi im making this blank window in microsoft visual studios 2012. (c++) Here is the code:

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#include <Windows.h>


int WINAPI wWinMain( HINSTANCE hInstance, HINSTANCE prevInstance, LPWSTR cmdLine, int cmdShow )

{
	UNREFERENCED_PARAMETER( prevInstance );
	UNREFERENCED_PARAMETER( cmdLine );

	WNDCLASSEX wndClass={ 0 };
	wndClass.cbSize=sizeof( WNDCLASSEX );
	wndClass.style=CS_HREDRAW | CS_VREDRAW;
	wndClass.lpfnWndProc=WndProc;
	wndClass.hInstance=hInstance;
	wndClass.hCursor=LoadCursor( NULL, IDC_ARROW );
	wndClass.hbrBackground=( HBRUSH )( COLOR_WINDOW + 1 );
	wndClass.lpszMenuName=NULL;
	wndClass.lpszClassName="DX11BookWindowClass";

	if( !RegisterClassEx( &wndClass))
		return -1;

	RECT rc={0,0,640,480};
	AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );

	HWND hwnd=CreateWindowA ( "DX11BookWindowClass", "Blank Win32 Window", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, NULL, NULL, hInstance, NULL );

	if( !hwnd )
		return -1;

	ShowWindow( hwnd, cmdShow );

	return 0;
}



Here is the error code:

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1>Build started 2/4/2013 9:10:23 PM.
1>ClCompile:
1>  main1.cpp
1>c:\users\#$%@\documents\visual studio 2012\projects\blankwindow\blankwindow\main1.cpp(13): error C2065: 'WndProc' : undeclared identifier
1>c:\users\#$%@\documents\visual studio 2012\projects\blankwindow\blankwindow\main1.cpp(26): warning C4003: not enough actual parameters for macro 'CreateWindowA'
1>c:\users\#$%@\documents\visual studio 2012\projects\blankwindow\blankwindow\main1.cpp(26): error C2059: syntax error : ')'
1>  main.cpp
1>c:\users\@#$%\documents\visual studio 2012\projects\blankwindow\blankwindow\main.cpp(13): error C2065: 'WndProc' : undeclared identifier
1>c:\users\#$%@\documents\visual studio 2012\projects\blankwindow\blankwindow\main.cpp(26): warning C4003: not enough actual parameters for macro 'CreateWindowA'
1>c:\users\#$%@\documents\visual studio 2012\projects\blankwindow\blankwindow\main.cpp(26): error C2059: syntax error : ')'
1>  Generating Code...
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:07.63
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Last edited on
cire (8284)
'WndProc' : undeclared identifier


I don't see where WndProc is defined or declared anywhere in your code. Your compiler doesn't see it either. Maybe you should declare/define it.
modoran (2077)
Or maybe you could get away by passing NULL as DispatchMessage is never called.
kaidto (14)
you should create your WndProc function.

it is used to catch and dispatch messages.

search through the web.

Windows Api Programming will help you out.
Willmannn (23)
Now How would i define it?
Willmannn (23)
return DefWindowProc(hWnd,

?
Lodger (128)
As others have pointed out, you are missing a Window Procedure (a WndProc function) and a message loop.

See here: http://msdn.microsoft.com/en-us/library/vstudio/bb384843.aspx
Willmannn (23)
I have read on and found a solution to the problem in the book... It was actually missing a few parts with the wndproc function.. thanks anyways!
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