I believe the only way to achieve this would be through code:

#define HELLO "MyCaption"

thisform.caption = HELLO


>Hello,
>
>Does anyone know of a way to insert a constant value (a defined value) into a property on a class or form and have the compiler replace it with the defined value when saving/compiling? I DO have the header file properly "included" in the class, but alas - no replacement appears to be happening.