Hi!
When I am using virtualstringtree in TFrame, I got an error Control "Frame1" has no parent window.
This happens when I enabled "LCL scaling" in project settings and Scaled property in Frame1 is set to True.
When I switch off Scaled in Frame1 or dissabled "LCL scaling", error does not ocuur.
Br, Robert
Lazarus 2.0.10 - 64bit
Windows 10