RECT 没太明白

RECT 的结构还是不太清楚，有时间再看看。

 

 

 

#include <windows.h>

 

 

#define ID_TIMER    1

 

 

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

 

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

 

PSTR szCmdLine, int iCmdShow)

 

{

 

static TCHAR szAppName[] = TEXT ("Beeper1") ;

 

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 ("Program requires Windows NT!"),

 

szAppName, MB_ICONERROR) ;

 

return 0 ;

 

}

 

 

 

hwnd = CreateWindow (szAppName, TEXT ("Beeper1 Timer Demo"),

 

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 BOOL   fFlipFlop = FALSE ;

 

HBRUSH                hBrush ;

 

HDC                           hdc ;

 

PAINTSTRUCT ps ;

 

static RECT        rc ;

 

static int cxChar;

static int cyChar;

 

switch (message)

{

case WM_CREATE:

SetTimer(hwnd, 1,1000, NULL);

       cxChar = LOWORD (GetDialogBaseUnits ()) ;

 

cyChar = HIWORD (GetDialogBaseUnits ()) ;

return 0;

case WM_SIZE:

rc.left             = 24 * cxChar ;

 

rc.top              =  24 * cyChar ;

 

rc.right            = LOWORD (lParam) ;

 

rc.bottom           = HIWORD (lParam) ;

 

return 0;

case WM_TIMER:

switch (wParam)

{

case 1:

fFlipFlop = !fFlipFlop;

InvalidateRect(hwnd,&rc,TRUE);

break;

}

return 0;

 

case WM_PAINT:

hdc=BeginPaint(hwnd,&ps);

GetClientRect(hwnd,&rc);

hBrush = CreateSolidBrush(fFlipFlop ? RGB(255,0,0) : RGB(0,0,255));

FillRect(hdc,&rc,hBrush);

EndPaint(hwnd,&ps);

DeleteObject(hBrush);

return 0;

case WM_DESTROY:

KillTimer(hwnd,1);

PostQuitMessage(0);

return 0;

}

return DefWindowProc( hwnd, message, wParam, lParam);

*/

 

HDChdc;

PAINTSTRUCT ps;

RECTrc;

static bool fFlog = false;

HBRUSHhBrush;

 

switch (message)

{

case WM_CREATE:

SetTimer( hwnd, 1, 1000, NULL);

return 0;

case WM_TIMER:

switch(wParam)

{

case 1:

fFlog=!fFlog;

InvalidateRect(hwnd,NULL,FALSE);

break;

}

return 0;

case WM_PAINT:

 

hdc = BeginPaint(hwnd,&ps);

GetClientRect(hwnd,&rc);

hBrush = CreateSolidBrush(fFlog ? RGB(0,255,0) : RGB(0,0,255));

FillRect(hdc,&rc,hBrush);

EndPaint(hwnd,&ps);

DeleteObject(hBrush);

return 0;

case WM_DESTROY:

PostQuitMessage(0);

KillTimer(hwnd,1);

return 0;

}

return DefWindowProc( hwnd, message, wParam, lParam);

}