Windows sets text and sends messages across processes

In-process set text, can call SetWindowText, cross-process this will be invalid, should be as follows::: SendMessage (HWnd, Wm_settext, NULL, (LPARAM) text content); Note that you can't use postmessage here.

Send the ENTER key to a window in another process as follows:
::P ostmessage (HWnd, WM_KEYDOWN, Vk_return, 0); You can't use SendMessage here.


If it is in process, it can also be used: SendInput and keybd_event, such as: keybd_event (vk_return, 0, 0, 0);


The cross-process window enumeration APIs are:
Findwindow,getwindow (HWnd, Gw_child/gw_hwndfirst/gw_hwndnext/gw_owner), FindWindowEx and so on.

Windows sets text and sends messages across processes