区分用户生成的和我自己的应用程序生成的鼠标移动

Question

My WinForms app moves the mouse cursor about the form simply by setting the Cursor.Position property in some kind of a loop with a timer.

I would like this movement to continue only till the user does not wield the mouse himself to move it. As soon as he or she does, I want my code to stop.

Therefore, I need a way to distinguish between mouse moves that the user generated mouse movement sent vs. those that my application generates.

Answer 1

If you use the Win32 SendInput API to position the mouse cursor, you can set a custom dwExtraInfo value in the MOUSEINPUT structure.

When processing an asynchronous (posted) message, you can use the Win32 API GetMessageExtraInfo to retrieve the custom value.

Answer 2

A straightforward solution for Windows 8 and up: use the GetCurrentInputMessageSource function.

if originId is IMO_INJECTED , the input is emulated. Otherwise, it usually equals IMO_HARDWARE .