在WIN32編程中,設置了定時器,我在WM_Timer消息中打上斷點,卻無法命中斷點,是怎麼回事?
大家看看我的代碼有沒有問題?
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
int TIMER1 = 1;
SYSTEMTIME st;
static TCHAR str[50];
switch (message)
{
case WM_CREATE:SetTimer(hwnd, TIMER1, 100, NULL);
return 0;
case WM_PAINT:
hdc = GetDC(hwnd);
TextOut(hdc, 0, 0, str, 50);
ReleaseDC(hwnd, hdc);
return 0;
case WM_TIMER:
GetLocalTime(&st);
GetTimeFormat(LOCALE_SYSTEM_DEFAULT, TIME_FORCE24HOURFORMAT, &st, "hh':'mm':'ss", str, 50);
return 0;
case WM_DESTROY:
KillTimer(hwnd, TIMER1);
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
/*--------------------------------------
BEEPER1.C -- Timer Demo Program ver1
--------------------------------------*/
#include <windows.h>
#include <stdlib.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("This 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)
{
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);
InvalidateRect(hwnd, NULL, FALSE);
return 0;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
GetClientRect(hwnd, &rc);
hBrush = CreateSolidBrush(RGB(rand()%255, rand()%255, rand()%255));
FillRect(hdc, &rc, hBrush);
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
KillTimer(hwnd, ID_TIMER);
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}