Modeless dialog should not return immediately......

I'm creating a modeless dialog but I don't want it to return immediately after the creation. In other words, I want it to behave like a modal one.

hDlgModeless = CreateDialog();

//I want the below portion of code to get executed only after the modeless dialog is disposed off....(by clicking OK and Cancel buttons..)
//code goes here

Is there any way of doing this...??? Due to some other restrictions, I cannot use a modal dialog in place of this. also , pls note, I'm doing this on 16-bit Win API. No MFC. No 32-bit.

Any help is greatly appreciated.

Thanx
Ram