Winforms shadow border with CS_DROPSHADOW

Asked Aug 04 '14 at 12:50

Active Apr 01 '20 at 08:41

Viewed 1,051 times

I am trying to achieve a shadow on a form with C# winforms 4.0. I did some searching on this and found the following answer :

private const int CS_DROPSHADOW = 0x00020000; 
protected override CreateParams CreateParams 
{ 
    get 
    { 
        // add the drop shadow flag for automatically drawing 
        // a drop shadow around the form 
        CreateParams cp = base.CreateParams; 
        cp.ClassStyle |= CS_DROPSHADOW; 
        return cp; 
    } 
}

However, using the above code, I can not see any shadow. I opened a new clean winforms project in VS2010 and still cannot see a thing. Need some guidance on what could be going wrong here.

Thanks.

edited Nov 11 '15 at 16:03

Irshad

asked Aug 04 '14 at 12:50

Shoham Ben-Har

Is your form a top-level form (i.e. not an MDI child)? Are drop shadows enabled on your system? – Frédéric Hamidi Aug 04 '14 at 12:56
What windows version are you targeting? – TaW Aug 04 '14 at 17:29
@FrédéricHamidi it's the only form I have in my app. (I try this on a new winforms project in VS2010). How can I check whether drop shadow is enabled? I'm targeting Windows7 64bit. – Shoham Ben-Har Aug 05 '14 at 08:04
@TaW I'm targeting Windows7 64bit. – Shoham Ben-Har Aug 05 '14 at 08:05
@FrédéricHamidi I tried to set TopLevel to both true & false. and it doesn't work on both cases. Further more, I checked the 'show shadow under menus' and it didn't helped as well :( – Shoham Ben-Har Aug 05 '14 at 10:20
Check [System Properties -> Advanced -> Show shadow under windows] is checked or not. If you un-check it, shadow border won't show. – Nam Bình Jul 10 '15 at 09:20

Winforms shadow border with CS_DROPSHADOW

0 Answers0