moderop.c

C#一个实例源代码

/*--------------------------------------------------
   ModeROP.c
  --------------------------------------------------*/

#include <windows.h>
#include "resource.h"
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("ModeROP") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
     
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = szAppName ;
     wndclass.lpszClassName = szAppName ;
     
     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("Program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindow (szAppName, TEXT ("Mode&ROP Rect"),
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          NULL, NULL, hInstance, NULL) ;
     
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     
     while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     static int  cxClient, cyClient ;
     HDC         hdc ;
     PAINTSTRUCT ps ;
	 HANDLE  hPen,hPenPre;
	 static  nMode=OPAQUE;
	 static  int   nROP=R2_COPYPEN;
     
	 hPen=CreatePen(PS_DASH,1,RGB(155,150,0));
     
     switch (message)
     {
     case WM_SIZE:
          cxClient = LOWORD (lParam) ;
          cyClient = HIWORD (lParam) ;
          return 0 ;
	 case WM_COMMAND:
		 switch(LOWORD(wParam))
		 {
		 case IDM_MODE_OPAQUE:
			 nMode=OPAQUE;
			 InvalidateRect(hwnd,NULL,TRUE);
			 break;
		 case IDM_MODE_TRANSPARENT:
			 nMode=TRANSPARENT;
			 InvalidateRect(hwnd,NULL,TRUE);
			 break;
		 case IDM_R2_BLACK:
			 nROP=R2_BLACK;
			 InvalidateRect(hwnd,NULL,TRUE);
             break;
         case IDM_R2_COPYPEN:
			 nROP=R2_COPYPEN;
			 InvalidateRect(hwnd,NULL,TRUE);
			 break;
         case IDM_R2_WHITE:
			 nROP=R2_WHITE;
			 InvalidateRect(hwnd,NULL,TRUE);
			 break;


		 }
		 return 0;



          
     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;
		  hPenPre=SelectObject(hdc,hPen);
		  SetBkColor(hdc,RGB(0,255,0));
		  SetBkMode(hdc,nMode);
		  SetROP2(hdc,nROP);
		  
		  if(nMode==OPAQUE)
		  TextOut(hdc,0,0,TEXT("OPAQUE"),lstrlen(TEXT("OPAQUE")));
		  else TextOut(hdc,0,0,TEXT("TRANSPARENT"),lstrlen(TEXT("TRANSPARENT")));

          Rectangle (hdc,     cxClient / 8,     cyClient / 8,
                          7 * cxClient / 8, 7 * cyClient / 8) ;
		  SelectObject(hdc,hPenPre);
                  
          EndPaint (hwnd, &ps) ;
          return 0 ;
          
     case WM_DESTROY:
		  DeleteObject(hPen);
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}