How are you adding new data? Please post relevant code. In Win32, you have to send the CB_ADDSTRING[^] message to the combo box to add a new string to the list. Or you can use the very convenient ComboBox_AddString[^] macro for this. When an item is selected, the CBN_SELCHANGE[^] notification message is sent. You need to handle that in your code. You will need to send CB_GETCURSEL[^] or use the ComboBox_GetCurSel[^] macro to get the new selection index. To get the text string, send CB_GETLBTEXT[^] or use the ComboBox_GetLBText[^] macro. «_Superman_»  _I love work. It gives me something to do between weekends. _Microsoft MVP (Visual C++) Polymorphism in C

wangafei wrote: yes! mfc can use api and win32 so you can do anything without mfc but it's not easy Agreed, however it's the project choice to utilize services of MFC or not. if the project is targeted to basic win32, then let it be.. anybody who can program in MFC can program in win32 too. "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow Never mind - my own stupidity is the source of every "problem" - Mixture cheers, Alok Gupta VC Forum Q&A :- I/IV Support CRY- Child Relief and You

Using Windows API to create Dialog see this