I want to write a dll using QT library
that can control and manupulate the caller executable QT controls.

for example I wantto change backcolor of QTMainForm's textedit1 (which is inside executable).
but this code in a dll that is loaded by executable that has a QTForm.
(dll has no QT Control objects.Just modifier functions that can loaded by other executable)

(thanks before for any answers)