INF: Custom Controls Must Use CS_DBLCLKS with Dialog Editor

ID Number: Q71223

3.00

WINDOWS

Summary:

For a custom control to function properly with the Dialog Editor

distributed with version 3.0 of the Microsoft Windows Software

Development Kit (SDK), the custom control window class must include

the CS_DBLCLKS style.

If the custom control does not have the CS_DBLCLKS style, double-

clicking the control in the Dialog Editor does not cause the custom

control function to display its style dialog box. However, the

control's style dialog box is still accessible from the Styles command

on the Edit menu.

More Information:

The Dialog Editor subclasses each control it creates and processes

WM_LBUTTONDBLCLK messages. In response to this message, the custom

control is asked to display its style dialog box.

If the custom control window class does not have the CS_DBLCLKS style,

Windows does not send any WM_LBUTTONDBLCLK messages to the control. As

a result, the Dialog Editor does not call the style dialog box

function for the custom control and no dialog box appears.

Additional reference words: 3.00