//var-definitionen
TRichEdit* rich;
//formcreate
rich = new TRichEdit(this);
rich->Parent = this; // oder ein Panel
rich->Left = 0;
rich->Top = 0;
rich->Width = 100;
rich->Height = 100;
// ...
//button1click oder andere methode
rich->Lines->Add("Hello World");
rich->Lines->Add("I can see you!");