为什么着段自绘BUTTON代码可以编译,但是就达到不了自己要的效果
*----------------------------------------
BTNLOOK.C -- Button Look Program
(c) Charles Petzold, 1998
----------------------------------------*/
#include <windows.h>
#define NUM (sizeof button / sizeof button[0])
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("BtnLook") ;
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 = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Button Look"),
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 HWND hwndButton ;
static RECT rect ;
BOOL InRect=FALSE;
POINT pt;
RECT rt;
DRAWITEMSTRUCT *lpdrawitem;
HBITMAP bmp;
HDC dcMem;
HBRUSH hBrushStatic,hBrushStaticTemp;
static int cxChar, cyChar,cxClient,cyClient ;
;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
hwndButton = CreateWindow ( TEXT("button"),
"i love you",
WS_CHILD | WS_VISIBLE | BS_OWNERDRAW,
500,500,
100,24,
hwnd, (HMENU) 0,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
return 0 ;
case WM_SIZE :
cxClient=LOWORD(lParam);
cyClient=HIWORD(lParam);
MoveWindow(hwndButton,cxClient/2,cyClient/2,100,24,TRUE);
return 0 ;
case WM_MOUSEMOVE:
pt.x=LOWORD(lParam);
pt.y=HIWORD(lParam);
rt.left=cxClient/2;
rt.right=cyClient/2;
rt.top=cxClient/2+100;
rt.bottom=cyClient/2+24;
if(InRect==FALSE)
{
if(PtInRect(&rt,pt))
{
InRect=TRUE;
InvalidateRect(hwndButton,NULL,TRUE);
}
}
if(InRect==TRUE)
{
if(!PtInRect(&rt,pt))
{
InRect=FALSE;
InvalidateRect(hwndButton,NULL,TRUE);
}
}
return 0;
case WM_DRAWITEM :
lpdrawitem=(LPDRAWITEMSTRUCT)lParam;
hBrushStatic=CreateSolidBrush(RGB(255,255,255));
FillRect(lpdrawitem->hDC,&lpdrawitem->rcItem, hBrushStatic);
hBrushStaticTemp=CreateSolidBrush(RGB(235,246,111));
SelectObject(lpdrawitem->hDC,hBrushStaticTemp);
Ellipse(lpdrawitem->hDC,lpdrawitem->rcItem.left,lpdrawitem->rcItem.top,lpdrawitem->rcItem.right,lpdrawitem->rcItem.bottom);
DeleteObject(hBrushStaticTemp);
if(InRect==TRUE)
{
bmp = (HBITMAP)LoadImage((HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE),
"iloveyou.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);
dcMem = CreateCompatibleDC(lpdrawitem->hDC);
SelectObject(dcMem, bmp);
BitBlt(lpdrawitem->hDC, 0, 0, 100, 100, dcMem, 0, 0, SRCCOPY);
PlaySound(TEXT("tujunyan.wav"),NULL,SND_FILENAME | SND_ASYNC);
ReleaseDC(hwnd, dcMem);
}
return 0;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}