SetMessageExtraInfo function user32

int SetMessageExtraInfo(
  1. int lParam

Sets the extra message information for the current thread. Extra message information is an application- or driver-defined value associated with the current thread's message queue. An application can use the GetMessageExtraInfo function to retrieve a thread's extra message information.

LPARAM SetMessageExtraInfo(
  LPARAM lParam


int SetMessageExtraInfo(int lParam) => _SetMessageExtraInfo(lParam);