源程序:
#include <windows.h>
#include <string.h>
#include <stdio.h>
LRESULT CALLBACK WindowFunc(HWND, UINT, WPARAM, LPARAM);
char szWinName[ ] = "MyWin"; /* name of window class */
HBITMAP hBit1; /* handle of bitmap */
HINSTANCE hInst; /* handle to this instance */
int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst,
LPSTR lpszArgs, int nWinMode)
{
HWND hwnd;
MSG msg;
WNDCLASSEX wcl;
/* Define a window class. */
wcl.cbSize = sizeof(WNDCLASSEX);
wcl.hInstance = hThisInst; /* handle to this instance*/
wcl.lpszClassName = szWinName; /* window class name */
wcl.lpfnWndProc = WindowFunc; /* window function */
wcl.style = 0; /* default style */
wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* standard icon */
wcl.hIconSm = LoadIcon(NULL, IDI_WINLOGO); /* small icon */
wcl.hCursor = LoadCursor(NULL, IDC_ARROW); /* cursor style */
wcl.lpszMenuName = NULL; /* no menu */
wcl.cbClsExtra = 0; /* no extra */
wcl.cbWndExtra = 0; /* information needed */
/* Make the window white. */
wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
/* Register the window class. */
if(!RegisterClassEx(&wcl)) return 0;
hInst = hThisInst; /* save instance handle */
/* Now that a window class has been registered, a window
can be created. */
hwnd = CreateWindow(
szWinName, /* name of window class */
"Custom Bitmap", /* title */
WS_OVERLAPPEDWINDOW, /* window style - normal */
CW_USEDEFAULT, /* X coordinate - let Windows decide */
CW_USEDEFAULT, /* Y coordinate - let Windows decide */
CW_USEDEFAULT, /* width - let Windows decide */
CW_USEDEFAULT, /* height - let Windows decide */
HWND_DESKTOP, /* no parent window */
NULL, /* no override of class menu */
hThisInst, /* handle of this instance of the program */
NULL /* no additional arguments */
);
/* Display the window. */
ShowWindow(hwnd, nWinMode);
UpdateWindow(hwnd);
/* Create the message loop. */
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg); /* translate keyboard messages */
DispatchMessage(&msg); /* return control to Windows 98 */
}
return msg.wParam;
}
/* This function is called by Windows 98 and is passed
messages from the message queue.
*/
LRESULT CALLBACK WindowFunc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
HDC DC, memDC;
switch(message)
{
case WM_CREATE: /* load the bitmap */
hBit1 = LoadBitmap(hInst, "MyBP1"); /* load bitmap */
break;
case WM_LBUTTONDOWN:
DC = GetDC(hwnd); /* get device context */
memDC = CreateCompatibleDC(DC); /* create compatible DC */
SelectObject(memDC,hBit1);
BitBlt(DC,LOWORD(lParam),HIWORD(lParam),64,64,
memDC,0,0,SRCCOPY);/*display image */
ReleaseDC(hwnd,DC);/* free the device context */
DeleteDC(memDC);/* free the memory context */
break;
case WM_DESTROY:/*terminate the program */
DeleteObject(hBit1);/* remove the bitmap */
PostQuitMessage(0);
break;
default:
/* Let Windows 98 process any messages not specified in
the preceding switch statement. */
return DefWindowProc(hwnd,message,wParam,lParam);
}
return 0;
}
