How to add a badge in a dragging image in Windows?

Seungjin Lee 1

Hello.

I'd like to add a badge in a dragging image in Windows like a dragging image from Explorer as shown in the picture. I mean the blue badge showing dragging files count.

I can make a dragging image using IDragSourceHelper but can't find any information on how to add a badge like what Explorer does.
Thank you.

1 answer

Castorix31 83,206 Reputation points

2022-03-18T13:55:08.72+00:00

Explorer just draws the number of items on the Layered dragging window ("SysDragImage" class)
(mainly DrawThemeBackground, DrawThemeText, then UpdateLayeredWindow)
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Seungjin Lee 1 Reputation point

2022-03-19T17:09:23.253+00:00

Thanks for the answer. Could you please tell me what classname should be for OpenThemeData() and what partId & stateId should be for DrawThemeBackground()?

Castorix31 83,206 Reputation points

2022-03-19T18:00:02.357+00:00

It uses VSCLASS_DRAGDROP theme
But you can let the Shell do it automatically, like in the MS sample DragDropVisuals
using SHDoDragDrop :

Seungjin Lee 1 Reputation point

2022-03-21T08:06:32.77+00:00

Thank you for the answer. I know SHDoDragDrop but it doesn't fit for my need. I think Microsoft must provide an api for this purpose.

Castorix31 83,206 Reputation points

2022-03-21T09:16:36.977+00:00

But whatever the method, you can draw anything over the dragging image

For example, a quick test with ImageList_DragMove where I draw a rectangle + text over the image (FillRect + FrameRect + DrawText to simplify) :
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How to add a badge in a dragging image in Windows?

1 answer