DM_SETDEFID message

Changes the identifier of the default push button for a dialog box.

#define WM_USER              0x0400
#define DM_SETDEFID         (WM_USER+1)

wParam

The identifier of a push button control that will become the default.

lParam

This parameter is not used.

The return value is always TRUE.

This message is processed by the DefDlgProc function. To set the default push button, the function can send WM_GETDLGCODE and BM_SETSTYLE messages to the specified control and the current default push button.

Using the DM_SETDEFID message can result in more than one button appearing to have the default push button state. When the system brings up a dialog, it draws the first push button in the dialog template with the default state border. Sending a DM_SETDEFID message to change the default button will not always remove the default state border from the first push button. In these cases, the application should send a BM_SETSTYLE message to change the first push button border style.

Reference

DefDlgProc

DM_GETDEFID

WM_GETDLGCODE

Conceptual

Dialog Boxes

Other Resources

BM_SETSTYLE

EM_SETLIMITTEXT