HowTo disable button in MFC app

I have a MFC app which displays a diaglog box with the submit button initialy disabled.

The submit button should only be enabled if the user has completed at least one edit box.

I am able to detect the changes in the edit boxes, but how do I enable the button.

Have spend a couple of ours on this already but cannot figure it out.


Thanks...

Use the ff. code:

GetDlgItem(BUTTONID)->EnableWindow(TRUE);