ID Number: Q74888
3.00
WINDOWS
Summary:
It is possible to modify the timing of the display of a dialog box.
For example, an application has its copyright message in a dialog box
that does not have any push buttons. This dialog is designed to be
displayed for five seconds and then to disappear. This article
discusses a method to implement this functionality.
More Information:
Windows draws the dialog box on the screen during the processing of a
WM_PAINT message. Because all other messages (except for WM_TIMER
messages) are processed before WM_PAINT messages, there may be some
delay before the dialog box is painted. This may be avoided by placing
the following code in the processing of the WM_INITDIALOG message:
ShowWindow(hDlg);
UpdateWindow(hDlg);
This code causes Windows to send a WM_PAINT message to the dialog box,
bypassing the other messages that may be in the application's queue.
To keep the dialog box on the screen for a particular period of time,
a timer should be created during the processing of the WM_INITDIALOG
message. When the WM_TIMER message is received, call EndDialog() to
close the dialog box.