create_bitmap.cpp

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#include <windows.h>
#include "Create_Bitmap.h"


#if defined (WIN32)
	#define IS_WIN32 TRUE
#else
	#define IS_WIN32 FALSE
#endif

#define IS_NT      IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S  IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95   (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32

HINSTANCE hInst;   // current instance

LPCTSTR lpszAppName  = "MyApp";
LPCTSTR lpszTitle    = "My Application";

BOOL RegisterWin95(CONST WNDCLASS* lpwc);

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
 {
   MSG      msg;
   HWND     hWnd;
   WNDCLASS wc;

   // Register the main application window class.
   //............................................
   wc.style         = CS_HREDRAW | CS_VREDRAW;
   wc.lpfnWndProc   = (WNDPROC)WndProc;       
   wc.cbClsExtra    = 0;                      
   wc.cbWndExtra    = 0;                      
   wc.hInstance     = hInstance;              
   wc.hIcon         = LoadIcon(hInstance, lpszAppName); 
   wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
   wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
   wc.lpszMenuName  = lpszAppName;              
   wc.lpszClassName = lpszAppName;

   if (IS_WIN95)
    {
      if (!RegisterWin95(&wc))
         return(FALSE);
    }
   else if (!RegisterClass(&wc))
      return(FALSE);

   hInst = hInstance;

   // Create the main application window.
   //....................................
   hWnd = CreateWindow(lpszAppName, lpszTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0,
                       CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
      return(FALSE);

   ShowWindow(hWnd, nCmdShow); 
   UpdateWindow(hWnd);         

   while(GetMessage(&msg, NULL, 0, 0))   
   {
      TranslateMessage(&msg); 
      DispatchMessage(&msg);  
   }

   return(msg.wParam); 
}


BOOL RegisterWin95(CONST WNDCLASS* lpwc)
{
   WNDCLASSEX wcex;

   wcex.style         = lpwc->style;
   wcex.lpfnWndProc   = lpwc->lpfnWndProc;
   wcex.cbClsExtra    = lpwc->cbClsExtra;
   wcex.cbWndExtra    = lpwc->cbWndExtra;
   wcex.hInstance     = lpwc->hInstance;
   wcex.hIcon         = lpwc->hIcon;
   wcex.hCursor       = lpwc->hCursor;
   wcex.hbrBackground = lpwc->hbrBackground;
   wcex.lpszMenuName  = lpwc->lpszMenuName;
   wcex.lpszClassName = lpwc->lpszClassName;

   // Added elements for Windows 95.
   //...............................
   wcex.cbSize = sizeof(WNDCLASSEX);
   wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName, 
                            IMAGE_ICON, 16, 16,
                            LR_DEFAULTCOLOR);
			
   return RegisterClassEx(&wcex);
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   switch(uMsg)
   {
      case WM_COMMAND :
              switch(LOWORD(wParam))
              {
                 case IDM_TEST :
                        {
                           HBITMAP hBitmap;
                           HDC     hDC, hMemDC;

                           // Create a blank bitmap.
                           //.......................
                           hBitmap = CreateBitmap(64, 64, 1, 1, NULL);

                           // Get the DC and create a 
                           // compatible DC.
                           //........................
                           hDC    = GetDC(hWnd);
                           hMemDC = CreateCompatibleDC(hDC);

                           // Select the bitmap into the 
                           // compatible DC and draw on it.
                           //..............................
                           SelectObject(hMemDC, hBitmap);
                           Rectangle(hMemDC, 0, 0, 64, 64);

                           SelectObject(hMemDC, GetStockObject(GRAY_BRUSH));
                           Ellipse(hMemDC, 0, 0, 64, 64);

                           // Display the bitmap on the window.
                           //..................................
                           BitBlt(hDC, 40, 40, 64, 64, 
                                   hMemDC, 0, 0, SRCCOPY);

                           ReleaseDC(hWnd, hDC);
                           DeleteDC(hMemDC);
                           DeleteObject(hBitmap);
                        }
                        break;

                 case IDM_ABOUT :
                        DialogBox(hInst, "AboutBox", hWnd, (DLGPROC)About);
                        break;

                 case IDM_EXIT :
                        DestroyWindow(hWnd);
                        break;
              }
              break;
      
      case WM_DESTROY :
              PostQuitMessage(0);
              break;

      default :
            return(DefWindowProc(hWnd, uMsg, wParam, lParam));
   }

   return(0L);
}


LRESULT CALLBACK About(HWND hDlg,UINT message, WPARAM wParam, LPARAM lParam)
 {
   switch (message)
    {
       case WM_INITDIALOG:
               return (TRUE);

       case WM_COMMAND:
               if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
                {
                  EndDialog(hDlg, TRUE);
                  return (TRUE);
                }
               break;
   }

   return (FALSE);
}