WM_ACTIVATEAPP

[Aceix]

This is a test code, but why is it that when I minimize the window for the second time, the wParam is TRUE(in WindowProc). Why is it TRUE instead of FALSE. Please help!

Code:

#define UNICODE
#include <windows.h>

LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam, LPARAM lParam);
const wchar_t* CName=L"class_name";
int x=1;

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASS wc;

    //filling the struct
    wc.lpfnWndProc=WindowProc;
    wc.hInstance=hInstance;
    wc.lpszClassName=CName;
    wc.cbClsExtra=0;
    wc.cbWndExtra=0;
    wc.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
    wc.hCursor=LoadCursor(NULL, IDC_ARROW);
    wc.hIcon=LoadIcon(NULL, IDI_APPLICATION);
    wc.style=0;


    if(!RegisterClass(&wc))
    {
        MessageBox(NULL,L"Class registration Failed !!!",L"Error",MB_ICONERROR);
        return 0;
    }

    HWND hwnd=CreateWindowEx(0,CName,L"My First Application Window",
                            WS_OVERLAPPEDWINDOW,
                            CW_USEDEFAULT,CW_USEDEFAULT,360,390,
                            NULL,NULL,hInstance,NULL);
    if(hwnd==NULL)
    {
        MessageBox(NULL,L"Windows Creation Failed!",L"Error",MB_ICONERROR|MB_OK);
        return 0;
    }
    ShowWindow(hwnd,nCmdShow);
    MSG msg;
    while(GetMessageW(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}


LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    switch(uMsg)
    {
        case WM_ACTIVATEAPP:
            if(wParam==FALSE) break;
            if(wParam==TRUE && x!=1)
            {
                MessageBox(NULL,L"Thanks for coming back!",L"Info...",MB_OK);
                return 0;
            }
            break;
        case WM_QUIT:
            DestroyWindow(hwnd);
            break;
        case WM_DESTROY:
			PostQuitMessage(0);
            break;
		case WM_PAINT:
            if(x==1)
            {
                HDC hdc;
                PAINTSTRUCT ps;
                BeginPaint(hwnd,&ps);
                MessageBox(NULL,L"\tI am being painted for the first run!\
                           \n    I got to know through the WM_PAINT message",L"Info...",MB_OK);
                FillRect(hdc,&ps.rcPaint,(HBRUSH)(COLOR_WINDOW)+1);
                EndPaint(hwnd,&ps);
                break;
            }
            else
            {
                HDC hdc;
                PAINTSTRUCT ps;
                BeginPaint(hwnd,&ps);
                FillRect(hdc,&ps.rcPaint,(HBRUSH)(COLOR_WINDOW)+1);
                EndPaint(hwnd,&ps);
                break;
            }
            break;
        default:
            return DefWindowProc(hwnd,uMsg,wParam,lParam);
    }
    x++;
    return 0;
}

[Texan40]

If you move the x++ into the WM_PAINT loop where x==1 and place it at the bottom everything seems to work okay. Otherwise x is larger than 1 by the time WM_PAINT is called and the first run message does not appear. When I compiled and ran the wParam is always TRUE when activating the minimized window.

[Aceix]

Thanks! but that still didn't solve the problem.
Try minimizing with the taskbar and see

[Texan40]

I dont' know if this is what behavior you want but instead of WM_ACTIVATEAPP why not WM_SYSCOMMAND ?

case WM_SYSCOMMAND:
{
  switch(wParam)
  {
    case SC_MINIMIZE:
    {
      MessageBox(hwnd,L"Window going inactive",L"Info...",MB_OK);
    } break;
    case SC_RESTORE:
    {
      MessageBox(hwnd,L"Window going active",L"Info...",MB_OK);
    } break;
  }
  return DefWindowProc(hwnd,uMsg,wParam,lParam);
}

[Aceix]

Thanks Texan40, this will be able to solve my problem. THANKS YOU!!!