User32 SetFocus not working - any ideas?

[wbjohnson]

hey guys, ive wrote a little app that takes a given a IntPtr handle to a random application.... it when gets all childwindows and looks for the first EDIT (CEdit) class and then tries to set focus to it.. i know it seems pointless, but its part of a large plan! hehe anyway, its just not working! im calling SetFocus(IntPtr) to the Edit class and its just ignore me! (ive even tried bringing the parent application to te front - that works btw) any ideas why SetFocus isnt putting the cursor in the Edit class ready for user input?

[Nader Elshehabi]

Hello

Quoted from MSDN:

If the hWnd parameter is invalid or the window is not attached to the calling thread's message queue, the return value is NULL. To get extended error information, call GetLastError.

Try to see the returned value, and GetLastError(). Also I suggest to SendMessage(WM_SETFOCUS) yourself, instead of calling SetFocu(hWnd).

Regards:rose:

[wbjohnson]

hi there, when i use SetFocus(), it doesnt work and i get this last error message: 1008 An attempt was made to reference a token that does not exist. ERROR_NO_TOKEN (i looked up the message on google) however - if i do what u suggested it works :D do you know why this way works and the other one doesnt?

[Nader Elshehabi]

Hello I'm glad that it works now.:) If you revise the qoute I posted from MSDN, you'd notice that SetFocus() function, sends the message to the current message queue. You are sending WM_SETFOCUS message to another application with another message queue. That's why you need to explicitly send the message yourself.

Regards:rose:

[wbjohnson]

ahhhhh thats excellent!! i understand it now! thanks ever so much for your help this evening, its much appriciated! Regards, Will