is there any error in this function

[Bummi]

Delphi-Quellcode:

Function call_to_func(mem, a, c: DWORD): integer;
var
b: integer;
begin
b := 0;

asm
mov ecx,mem
mov edx,c
mov eax, a
push ecx
call ecx //--->!!! Program try to call assembled code which is stored in mem pointer
pop ecx
mov b, eax
end;
call_to_func := b;
end;