窗口的最前端显示

需求：窗口最前端显示，窗口保持激活状态

但是用过很多方法都不可以

类似API：SetWindowPos(),ActivateTopParent()等等总是出现问题，后来codeobject找到了解决的方法，在这里分享一下

2种方式

1，类似Alt+Tab键切换窗口（因为是模拟按键，貌似会遗留下按键状态的异常，不过可以解决）

void SetForegroundWindowInternal(HWND hWnd)
{
if(!::IsWindow(hWnd)) return;

BYTE keyState[256] = {0};
//to unlock SetForegroundWindow we need to imitate Alt pressing
if(::GetKeyboardState((LPBYTE)&keyState))
{
if(!(keyState[VK_MENU] & 0x80))
{
::keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY | 0, 0);
}
}

::SetForegroundWindow(hWnd);

if(::GetKeyboardState((LPBYTE)&keyState))
{
if(!(keyState[VK_MENU] & 0x80))
{
::keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
}
}

2

void SetForegroundWindowInternal(HWND hWnd)
{
if(!::IsWindow(hWnd)) return;

//relation time of SetForegroundWindow lock
DWORD lockTimeOut = 0;
HWND  hCurrWnd = ::GetForegroundWindow();
DWORD dwThisTID = ::GetCurrentThreadId(),
      dwCurrTID = ::GetWindowThreadProcessId(hCurrWnd,0);

//we need to bypass some limitations from Microsoft :)
if(dwThisTID != dwCurrTID)
{
::AttachThreadInput(dwThisTID, dwCurrTID, TRUE);

::SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT,0,&lockTimeOut,0);
::SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT,0,0,SPIF_SENDWININICHANGE | SPIF_UPDATEINIFILE);

::AllowSetForegroundWindow(ASFW_ANY);
}

::SetForegroundWindow(hWnd);

if(dwThisTID != dwCurrTID)
{
::SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT,0,(PVOID)lockTimeOut,SPIF_SENDWININICHANGE | SPIF_UPDATEINIFILE);
::AttachThreadInput(dwThisTID, dwCurrTID, FALSE);
}
}

 

原文：http://www.codeproject.com/Tips/76427/How-to-bring-window-to-top-with-SetForegroundWindo.aspx