how to do?

[gamecocks]

I have two combo box, One depends on other. I choose different type in first one. Second one show different list. How to make them related each other. Thanks.

[indiocolifa]

It's not difficult.

See the Combobox control reference in the Platform SDK.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/comboboxes/comboboxes.asp

TO handle the first combobox changes, handle the CBN_SELCHANGE message. In this handling code, you can checkup what element was selected with the CB_GETCURSEL message. According to this info, you can set the second combo selection sending a CB_SETCURSEL message to it.

You can use CB_SETITEMDATA to associate a value with each item -- this way, it's easier to checkout what's selected on the combo.

Hope this helps.

[gamecocks]

Do you provide some example? Thanks

[gamecocks]

how to let first combobox to issue CBN_SELCHANGE? In Class Wizard Message Tap. In Object ID box, I can't find first combobox ID. Thanks

[JohnCz]

Something tells me that you are using MFC not Windows API. Are you?