请教大侠: 我在SDK程序中想使用定时器事件WM-TIMER,但是定时器设置函数SetTimer(hWnd,nIDEvent,uElapse,lpTimerFunc)不知怎样使用?我查了几个《API手册》都没有SetTimer()函数,另外怎样设置定时器的启动和停止?请朋友们帮帮忙,谢谢 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 /*----------------------------------------- BEEPER1.C -- Timer Demo Program No. 1 (c) Charles Petzold, 1998 -----------------------------------------*/#include <windows.h>#define ID_TIMER 1LRESULT 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 ; RECT rc ; switch (message) { case WM_CREATE: SetTimer (hwnd, ID_TIMER, 1000, NULL) ; return 0 ; case WM_TIMER : MessageBeep (-1) ; fFlipFlop = !fFlipFlop ; InvalidateRect (hwnd, NULL, FALSE) ; 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, ID_TIMER) ; PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ;} /*---------------------------------------- BEEPER2.C -- Timer Demo Program No. 2 (c) Charles Petzold, 1998 ----------------------------------------*/#include <windows.h>#define ID_TIMER 1LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;VOID CALLBACK TimerProc (HWND, UINT, UINT, DWORD ) ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){ static TCHAR szAppName[] = TEXT ("Beeper2") ; 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 ("Beeper2 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){ switch (message) { case WM_CREATE: SetTimer (hwnd, ID_TIMER, 1000, TimerProc) ; return 0 ; case WM_DESTROY: KillTimer (hwnd, ID_TIMER) ; PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ;}VOID CALLBACK TimerProc (HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime){ static BOOL fFlipFlop = FALSE ; HBRUSH hBrush ; HDC hdc ; RECT rc ; MessageBeep (-1) ; fFlipFlop = !fFlipFlop ; GetClientRect (hwnd, &rc) ; hdc = GetDC (hwnd) ; hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ; FillRect (hdc, &rc, hBrush) ; ReleaseDC (hwnd, hdc) ; DeleteObject (hBrush) ;} 第三种用法:传递给SetTimer的hwnd参数被设置为NULL,并且第二个参数被忽略了iTimerID = SetTimer(NULL, 0, wMseclInterval, TimerProc);KillTimer的第一个参数也必须为NULL,计时器ID必须是SetTimer的返回值KillTimer(NULL, iTimerID);这是三种调用方法。 怎样子类化CColorDialog或者通过HOOK过程实现自定义CColorDialog Directshow中IGraphBuilder的render阻塞了 DLL 使用 如何在MFC的图像控件显示图像? 问一个自绘listbox窗口的问题 目录递归遍历的问题!!! 请问QQ里删除的聊天记录可以恢复么? ES_AUTOHSCROLL风格改变了,编辑控件的自动水平滚动的特性怎么没有变? 散分了,请问怎样在CView中加载BMP图片 vc6中怎么无法加入自己的类 四级终于过了,进东软了(从此翻开人生新的一页)*****散分 为什么文件删不掉,急!急!急!在线等待
BEEPER1.C -- Timer Demo Program No. 1
(c) Charles Petzold, 1998
-----------------------------------------*/#include <windows.h>#define ID_TIMER 1LRESULT 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 ;
RECT rc ;
switch (message)
{
case WM_CREATE:
SetTimer (hwnd, ID_TIMER, 1000, NULL) ;
return 0 ; case WM_TIMER :
MessageBeep (-1) ;
fFlipFlop = !fFlipFlop ;
InvalidateRect (hwnd, NULL, FALSE) ;
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, ID_TIMER) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
BEEPER2.C -- Timer Demo Program No. 2
(c) Charles Petzold, 1998
----------------------------------------*/#include <windows.h>#define ID_TIMER 1LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
VOID CALLBACK TimerProc (HWND, UINT, UINT, DWORD ) ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("Beeper2") ;
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 ("Beeper2 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)
{
switch (message)
{
case WM_CREATE:
SetTimer (hwnd, ID_TIMER, 1000, TimerProc) ;
return 0 ;
case WM_DESTROY:
KillTimer (hwnd, ID_TIMER) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}VOID CALLBACK TimerProc (HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime)
{
static BOOL fFlipFlop = FALSE ;
HBRUSH hBrush ;
HDC hdc ;
RECT rc ;
MessageBeep (-1) ;
fFlipFlop = !fFlipFlop ;
GetClientRect (hwnd, &rc) ;
hdc = GetDC (hwnd) ;
hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ;
FillRect (hdc, &rc, hBrush) ;
ReleaseDC (hwnd, hdc) ;
DeleteObject (hBrush) ;
}
传递给SetTimer的hwnd参数被设置为NULL,并且第二个参数被忽略了
iTimerID = SetTimer(NULL, 0, wMseclInterval, TimerProc);KillTimer的第一个参数也必须为NULL,计时器ID必须是SetTimer的返回值
KillTimer(NULL, iTimerID);这是三种调用方法。