Programmatically change Acceptbutton want work!

If you try to change the Form.Acceptbutton of a form in the Click event of another button, that is currently the Acceptbutton then you must: #1 //Select next control (simulates Tab press) this.SelectNextControl(this, true, true, true, true); #2 //Set new Acceptbutton this.ParentForm.AcceptButton = buttonLogin; when you press Enter 2times now it works! UPDATEif SelectNextControl doesnt work use this.SelectNextControl(buttonWhichIsActuallySelected, true, true, true, true); then it should work!