integrate a graphical interface in a dll

Hello

I developed an application that uses a graphical interface as input interface

the program executable mode works properly,

I created the project dll and I tried to use the language (MTL)

I managed to read the function and executed (by proving popup msg) but the problem I can not launch the GUI "graphical interface" , I think we should integrate. "uir" but I have not found means

you find attached the error msg when called, who can help me please