Edit Control

IDC_EDIT1

SetDlgItemText(IDC_EDIT1,sRxBuf); //set text to Edit Control

GetDlgItemText(IDC_EDIT1,sRxBuf); //get text from Edit Control

ref:

http://msdn.microsoft.com/library/cht/default.asp?url=/library/CHT/vccore/html/_core_retrieving_data_from_the_dialog_object.asp

http://msdn.microsoft.com/library/cht/default.asp?url=/library/CHT/vccore/html/vcconexampleimplementingpropertypage.asp