学步园

在codeguru找到的一份源码，相比前面两个相比更是，更加严谨：

//////////////////////////////////////////////////////////////////////////<br /> // TOMsgBox.h<br /> //</p> <p>#include <windows.h><br /> #include <process.h><br /> #include <tchar.h></p> <p>#define TIME_TO_APPEAR 1000<br /> #define IDCLOSED_BY_TIMEOUT 50</p> <p>static HWND hwndMsgBox = NULL;<br /> static BOOL bUserIsHere = FALSE;</p> <p>typedef struct<br /> {<br /> DWORD CurrentThreadID;<br /> HANDLE EventHandle;<br /> UINT uElapse;<br /> UINT uBlinkingTime;<br /> } trMyData;</p> <p>BOOL CALLBACK FindMsgBox(HWND hwnd, LPARAM lParam)<br /> {<br /> TCHAR ClassNameBuf[256];<br /> BOOL RetVal = TRUE;</p> <p> int Ret = GetClassName(hwnd, ClassNameBuf, 100);<br /> if (!_tcscmp(ClassNameBuf, _T("#32770")))<br /> {<br /> hwndMsgBox = hwnd;<br /> RetVal = FALSE;<br /> }<br /> return RetVal;<br /> }</p> <p>LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)<br /> {<br /> if ( (WM_KEYFIRST <= uMsg && uMsg <= WM_KEYLAST) ||<br /> (WM_MOUSEFIRST <= uMsg && uMsg <= WM_MOUSELAST) ||<br /> (WM_NCMOUSEMOVE <= uMsg && uMsg <= WM_NCMBUTTONDBLCLK) )<br /> bUserIsHere = TRUE;</p> <p> return CallWindowProc((WNDPROC)GetWindowLong(hwnd, GWL_USERDATA), hwnd, uMsg, wParam, lParam);<br /> }</p> <p>BOOL CALLBACK EnumChildProc(HWND hwnd, LPARAM lParam)<br /> {<br /> if (lParam)<br /> SetWindowLong(hwnd, GWL_USERDATA, SetWindowLong(hwnd, GWL_WNDPROC, (long)MyWindowProc));<br /> else<br /> SetWindowLong(hwnd, GWL_WNDPROC, GetWindowLong(hwnd, GWL_USERDATA));<br /> return TRUE;<br /> }</p> <p>unsigned int _stdcall TimeoutMsgBox(void *pParam)<br /> {<br /> trMyData *prMyData = (trMyData *)pParam;<br /> UINT uTime, uBlinkingTime = prMyData->uBlinkingTime;<br /> UINT uElapse, uCaretBlinkTime;<br /> DWORD dWaitRetVal;</p> <p> if (prMyData->uElapse <= TIME_TO_APPEAR)<br /> return 0;</p> <p> prMyData->uElapse-= TIME_TO_APPEAR;</p> <p> //Give time for MessageBox to appear<br /> Sleep(TIME_TO_APPEAR);</p> <p> EnumThreadWindows(prMyData->CurrentThreadID, FindMsgBox, NULL);<br /> if (!hwndMsgBox)<br /> return 0;<br /> SetWindowLong(hwndMsgBox, GWL_USERDATA, SetWindowLong(hwndMsgBox, GWL_WNDPROC, (long)MyWindowProc));<br /> EnumChildWindows(hwndMsgBox, EnumChildProc, TRUE);<br /> if (uBlinkingTime > prMyData->uElapse)<br /> uBlinkingTime = prMyData->uElapse;</p> <p>_Again:<br /> uElapse = prMyData->uElapse - uBlinkingTime;<br /> dWaitRetVal = WaitForSingleObject(prMyData->EventHandle, uElapse);<br /> if (dWaitRetVal == WAIT_TIMEOUT)<br /> {<br /> if (bUserIsHere)<br /> {<br /> bUserIsHere = FALSE;<br /> goto _Again;<br /> }<br /> if ((int)uBlinkingTime > 0)<br /> {<br /> SetForegroundWindow(hwndMsgBox);<br /> uCaretBlinkTime = GetCaretBlinkTime();<br /> uTime = uBlinkingTime;<br /> while ((int)uTime > 0)<br /> {<br /> FlashWindow(hwndMsgBox, TRUE);<br /> dWaitRetVal = WaitForSingleObject(prMyData->EventHandle, uCaretBlinkTime);<br /> if (dWaitRetVal != WAIT_TIMEOUT)<br /> break;<br /> if (bUserIsHere)<br /> {<br /> bUserIsHere = FALSE;<br /> SendMessage(hwndMsgBox, WM_NCACTIVATE, (WPARAM)(GetForegroundWindow() == hwndMsgBox), 0);<br /> goto _Again;<br /> }<br /> uTime-= uCaretBlinkTime;<br /> }<br /> }<br /> }</p> <p> SetWindowLong(hwndMsgBox, GWL_WNDPROC, GetWindowLong(hwndMsgBox, GWL_USERDATA));<br /> EnumChildWindows(hwndMsgBox, EnumChildProc, FALSE);<br /> if (dWaitRetVal == WAIT_TIMEOUT)<br /> EndDialog(hwndMsgBox, IDCLOSED_BY_TIMEOUT);</p> <p> return 0;<br /> }</p> <p>int MsgBoxWithTimeout(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType, UINT uElapse, UINT uBlinkingTime)<br /> {<br /> trMyData rMyData;<br /> rMyData.CurrentThreadID = GetCurrentThreadId();<br /> rMyData.uElapse = uElapse;<br /> rMyData.uBlinkingTime = uBlinkingTime;<br /> rMyData.EventHandle = CreateEvent(NULL, TRUE, FALSE, NULL);</p> <p> unsigned int uThreadID;<br /> HANDLE hThreadHandle = (HANDLE)_beginthreadex(NULL, 0, TimeoutMsgBox,<br /> (void*)&rMyData, 0, &uThreadID);</p> <p> if (hThreadHandle)<br /> CloseHandle(hThreadHandle);</p> <p> int Res = MessageBox(hWnd, lpText, lpCaption, uType);</p> <p> SetEvent(rMyData.EventHandle);<br /> CloseHandle(rMyData.EventHandle);</p> <p> return Res;<br /> }

//////////////////////////////////////////////////////////////////////////<br /> // main.cpp<br /> //</p> <p>#include "TOMsgBox.h"</p> <p>void main()<br /> {<br /> int nRes = MsgBoxWithTimeout(NULL, "If there is no user interaction,/n<br /> this message box should close in 6 seconds",<br /> "Message Box with Timeout", MB_OK, 6000, 3000);<br /> }

 （另外，感谢徐艺波大佬在百忙之中提供无私的帮助，致敬！）