[Windows programming] Use attachthreadinput to capture keyboard input in other windows

In some cases (such as a soft screen keyboard or input method)Program). You can use the Win32 API function to enter messages in the current focus window without entering the focus.Attachthreadinput ()To solve this problem. Attachthreadinput (Idattach) To connect to another thread (Idattachto).

 

Function Definition:

Bool winapi attachthreadinput (
_ In DWORDIdattach,
_ In DWORDIdattachto,
_ In boolFattach
);

 

Usage example:

Attachthreadinput (

: Getwindowthreadprocessid (: getforegroundwindow (), null), // thread ID of the current focus window

: Getcurrentthreadid (), // your own thread ID

True );