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TDN_EXPANDO_BUTTON_CLICKED notification code

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Sent by the task dialog when the user clicks on the dialog's expando button. This notification is received only through the task dialog callback function, which can be registered using the TaskDialogIndirect method.

TDN_EXPANDO_BUTTON_CLICKED
        
   WPARAM wParam;
   LPARAM lParam;

Parameters

wParam

A BOOL that is TRUE if the dialog is expanded, or FALSE if not.

lParam

Must be zero.

Return value

The return value is ignored.

Remarks

The example in the Syntax section shows the cast to wParam before sending the notification. LPARAM is not used and must be zero.

Requirements

Requirement Value
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2008 [desktop apps only]
Header
Commctrl.h