Programmatically change combobox

I need to update a combobox with a new value so it changes the reflected text in it. The cleanest way to do this is after the combobox has been initialised and with a message.

So I am trying to craft a postmessage to the hwnd that contains the combobox.

So if I want to send a message to it, changing the currently selected item to the nth item, what would the PostMessage look like?

I am guessing that it would involve ON_CBN_SELCHANGE, but I can't get it to work right.

Thanks, G.

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Originally Posted by grahamr (work)

I need to update a combobox with a new value ...

I am guessing that it would involve ON_CBN_SELCHANGE, but I can't get it to work right.

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No, you guessed wrong.
CBN_SELCHANGE is a notification message being sent when the user changes the current selection in the list box of a combo box.
To change selection programmatically using pülain Win32 APIs you need to SendMessage CB_SETCURSEL (or CB_SELECTSTRING).
If you are using MFC (which would be more easier to develop) - then have a look at the CComboBox::SetCurSel, CComboBox::SelectString methods.