[Windows programming] How to determine if a window has stopped responding

Use the API function ishungappwindow to determine whether the window has stopped responding. Therefore, you can use other threads to close this window to avoid poor user experience.

 

BoolIshungappwindow(
HwndHwnd
);

 

Msdn documentation:Http://msdn.microsoft.com/en-us/library/ms633526.aspx

 

This function is available in Win2000. In earlier operating systems, you can use the sendmessagetimeout API function to achieve the same purpose.

 

Lresult sendmessagetimeout (
HwndHwnd,
UintMSG,
WparamWparam,
LparamLparam,
UintFuflags,
UintUtimeout,
Pdword_ptrLpdwresult
);

 

Sample Code:

LR = sendmessagetimeout (hwnd, wm_null, 0, 0, smto_abortifhung | smto_block, 1000, & dwresult );

If (LR)

{

// Not hang

}

Else

{

// Hang

}