i declare gSTRING public, in main module.
but i try diferent syntax for SendMessage function, like:
SendMessage CLng(&HC0500), WM_SETTEXT, 0&, gSTRING
or like a simple test
SendMessage CLng(&HC0500),WM_SETEXT, 0 ,"Hello World"

in fact, no mather what is the gSTRING value, or lenght, i try to send numeric value trugh the another variable wich are declare integer, long, i try to send just strings with diferent lenght, bat all the time i receive the same result, like you see early.
how you see the results is all the time the same, strange and the lenght is the same.
i realy don't know what happend