Show Help Button in the Title-Bar of the Window

The Help icon (?) is only there when HelpButton = True and MaximizeBox and MimizeBox are both set to False. This is the windows standard. If you really want to go beyond and add a button anyway, you'll have to customize the titlebar.

A workaround is to provide your own button to trigger the same action. Put it somewhere close to the upper right corner. You trigger this by sending yourself a WM_SYSCOMMAND message, just like the standard help button does.

privatevoidHelp_Click(objectsender,EventArgse){
Help.Capture=false;
SendMessage(this.Handle,WM_SYSCOMMAND,(IntPtr)SC_CONTEXTHELP,IntPtr.Zero);
}
privateconstintWM_SYSCOMMAND=0x112;
privateconstintSC_CONTEXTHELP=0xf180;
[System.Runtime.InteropServices.DllImport("user32.dll")]
privatestaticexternIntPtrSendMessage(IntPtrhWnd,intmsg,IntPtrwp,IntPtrlp);

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Shakti Singh Dulawat10y ago
Accepted answer
The Help icon (?) is only there when HelpButton = True and MaximizeBox and MimizeBox are both set to False. This is the windows standard. If you really want to go beyond and add a button anyway, you'll have to customize the titlebar.

A workaround is to provide your own button to trigger the same action. Put it somewhere close to the upper right corner. You trigger this by sending yourself a WM_SYSCOMMAND message, just like the standard help button does.
privatevoidHelp_Click(objectsender,EventArgse){
Help.Capture=false;
SendMessage(this.Handle,WM_SYSCOMMAND,(IntPtr)SC_CONTEXTHELP,IntPtr.Zero);
}
privateconstintWM_SYSCOMMAND=0x112;
privateconstintSC_CONTEXTHELP=0xf180;
[System.Runtime.InteropServices.DllImport("user32.dll")]
privatestaticexternIntPtrSendMessage(IntPtrhWnd,intmsg,IntPtrwp,IntPtrlp);