BaseForm.WndProc(Message) Method
Definition
Important
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Reroutes the context-sensitive Help button events to the ShowHelp() method.
protected:
override void WndProc(System::Windows::Forms::Message % m);protected override void WndProc (ref System.Windows.Forms.Message m);override this.WndProc : -> unitProtected Overrides Sub WndProc (ByRef m As Message)Parameters
Examples
The following example reroutes the context-sensitive Help button events to the ShowHelp method and logs calls to the ShowHelp method.
private const int SC_CONTEXTHELP = 0xF180;
private const int WM_SYSCOMMAND = 0x0112;
protected override void WndProc(ref Message m) {
if ((m.Msg == WM_SYSCOMMAND) &&
((int)m.WParam == SC_CONTEXTHELP)) {
if (CanShowHelp) {
ShowHelp();
LogHelpCalls();
}
} else {
base.WndProc(ref m);
}
}