I am just trying to create a form control in winform in .net with custom shaped of balloon shape. There is need of a balloon tooltip which is transparent and I can put buttons on tooltip,but tooltip in .net does not provide facality that we can put the buttons on tooltip control so I want to make a form control looks like a balloon tooltip and so I can put buttons on that form looking like a tooltip.But I cannot show window form control look like a balloon tooltip. So what should I do?? I tried in one way that I create a image in powerpoint of balloon shape and set it to as background image of form property.But there is no solution with that.
The method in the above article will work, but if you want rounded corners, this will look pretty rough, as there is no anti-aliasing capability here.
Stewbob
2009-12-08 21:53:05
+1
A:
The Control class supports a BackColor with an alpha < 255, it is automatic. It asks the Parent to draw itself to produce the background of the control, then draws itself on top of that. However, you'll want a top-level window for a balloon. That's a window type that can arbitrarily overlap another window and isn't confined by the client area of an underlying window. It has no Parent. A ToolTip is such a window.
The only control available in Windows Forms that can be an top-level window is a Form. Problem is: the transparency trick no longer works. Since a top-level window doesn't have a Parent, there isn't any obvious window to ask to draw the background. It could be many windows, belonging to other processes. You can get transparency in a Form with its TransparencyKey property. But that's a "hard" transparency, equivalent to an alpha of 0. You probably want a soft one. Another nasty problem is that drawing anti-aliased (ClearType) text no longer works since there is no reliable background pixel color anymore.
Long story short: you can't make this work well unless you confine the balloon to the client area of a form. A control, not a form.
Hans Passant
2009-12-08 12:39:22
Why should he do that? They are good links and a good short answer to a short question.
Stormenet
2009-12-09 10:58:49
A:
You can try to hook on the Paint event of the control and draw the Visual of the button there.
Minustar
2009-12-09 10:39:36
A:
Are you looking for custom controls in general? You can always try www.codeproject.com
They have some great source code for what I think you are looking for.
broke
2009-12-09 17:13:35
A:
Its not c# but can be of some help. : Create an Irregular shaped Windows Form with VB.NET
Shoban
2009-12-12 09:25:01