TD 7.4.6 strange compiler error on SalWindowIsDerivedFromClass

[Mecki]

Hi,

I get a strange message when testing a WindowHandle against a GroupBox class using the SalWindowIsDerivedFromClass( hWndGroupBox, cGroupBoxBefore ) function.
The message is:
Error: Reference to 'MyValue' is not within an object having a value.
But SalWindowClassName( hWndGroupBox ) = 'cGroupBoxBefore' works fine.

SalWindowIsDerivedFromClass.png

[Mecki]

same message occurs when testing with Background Text Class or Frame Class

SalWindowIsDerivedFromClass.7z