Invalid class typecast

SHH Sp. z o.o.

Hi.

I have a problem with drag & drop one of the panels in my application. I receive "Invalid class typecast" when moving and trying to dock panel.

From Vcl.Controls problem occurs in Target := TControl(DragFindTarget(Pos, TargetHandle, DragControl.DragKind, DragControl));

Any ideas how to solve this issue ?

Eugene Balabuev (LMD)

Its not clear from your description, with which of LMD products you have the issue?

SHH Sp. z o.o.

I have already found out what was the issue - one of the components from another library is incompatible with LMD. To be more precise it's TLMDDockPanel and TAdvEdit. When AdvEdit is placed on panel and you will try to move it then you get above error.