TDN_TIMER notification code

Sent by a task dialog approximately every 200 milliseconds. This notification code is sent when the TDF_CALLBACK_TIMER flag has been set in the dwFlags member of the TASKDIALOGCONFIG structure that was passed to the TaskDialogIndirect function. This notification code is received only through the task dialog callback function, which can be registered using the TaskDialogIndirect method.

TDN_TIMER    

   WPARAM wParam;
   LPARAM lParam;

Parameters

wParam

A DWORD that specifies the number of milliseconds since the dialog was created or this notification code returned S_FALSE.

lParam

Must be zero.

Return value

To reset the tickcount, the application must return S_FALSE, otherwise the tickcount will continue to increment.

Requirements