using VB6 functions in QB64

[Ophelius]

Hi,
I read in the manual that it's possible to use external functions. I'm porting some code from an old Visual Basic 6 program, and would like to use in my QB64 program some of the functions that are built in with VB6.
One of them is called Format(), which says in the object browser it's part of VBA.Strings, and VBA is a library from VBA6.dll.

Any help would be appreciated to figure out how to use this VB6 function and more in QB64.

Thanks