i am making a program that's calculate Meters Per Second into Kilometers Per Hour.. i used this piece of code to do the calculate:

Code:
void __fastcall Tmpstokmph::calculate(TObject *Sender)
{
kmph->Text = FloatToStrF((StrToFloat (mps * 60) * 60) / 1000, ffNumber, 4 , 10);
}
But if i compile it it's say: Illigel use of pointers.

I can't solve it.. can any1 help me plz? (For if u need some info, i just started the Windows C++)

PS: kmph and mps are both names of text fields, so u know it