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C-/C++-Quelltext

#include <windows.h>
 
 
LRESULT CALLBACK WindowProcedure(HWND hwnd,UINT msg,WPARAM 
 
wparam,LPARAM lparam);
HWND awindow;
HWND bwindow;
void Register(WNDCLASSEX WindowClass)
{
 RECT DesktopSize;
   GetClientRect(GetDesktopWindow(),&DesktopSize);
   WindowClass.cbSize = sizeof(WNDCLASSEX);
   WindowClass.style = CS_HREDRAW | CS_VREDRAW;
   WindowClass.lpfnWndProc = WindowProcedure;
   WindowClass.cbClsExtra = 0;
   WindowClass.cbWndExtra = 0;
   WindowClass.hInstance = GetModuleHandle(NULL);
   WindowClass.hIcon = NULL;
   WindowClass.hCursor = NULL;
   WindowClass.hbrBackground = GetSysColorBrush(COLOR_BTNFACE);
   WindowClass.lpszMenuName = NULL;
   WindowClass.lpszClassName = "ClassName";
   WindowClass.hIconSm = LoadIcon(NULL,IDI_APPLICATION);
   RegisterClassEx(&WindowClass);
}
 
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE PrevInstance, LPSTR Ipcmdline, int cCmdShow)
{
MSG Message; 
WNDCLASSEX WindowClass;
 
ZeroMemory(&WindowClass,sizeof(WNDCLASSEX));
Register(WindowClass);
 
 
awindow=CreateWindow( "ClassName",
                       "Window A",
                        WS_OVERLAPPED|WS_SYSMENU|WS_VISIBLE,
                        200,300,
                        200,300,
                        NULL,
                        NULL,
                        GetModuleHandle(NULL),
                        NULL);
 
 
 
 

bwindow=CreateWindow( "ClassName",
                          "Window B",
                           WS_OVERLAPPED|WS_SYSMENU|WS_VISIBLE,
                           500,300,
                           200,300,
                           NULL,
                           NULL,
                           GetModuleHandle(NULL),
                           NULL);


ZeroMemory(&Message,sizeof(MSG));
while(Message.message!=WM_QUIT) 
 {
         if(PeekMessage(&Message,NULL,0U,0U,PM_REMOVE)) 
           {    
                    TranslateMessage(&Message); 
                    DispatchMessage(&Message); 
            {
}
return 0;
}

LRESULT CALLBACK WindowProcedure(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam)
{
switch(msg)

{
              case WM_KEYDOWN:
               {
                            switch(wparam)
                             {
                                 case VK_ESCAPE: 
                                  {
                                    DestroyWindow(bwindow);
                                    break;
                                   }
                              }
                              return 0;
                 }
                 case WM_DESTROY:
                 {
                        PostQuitMessage(0);
                          break;
                 }
}
return DefWindowProc(hwnd,msg,wparam,lparam);
}