How to change drop down list Height of a ComboBox

[poda]

Hai Friends, I am in need to change the height of the drop down list of a combo box. When a combo box is clicked, it shows only the first 8 items and remaining items can be scrolled to view. How to increase the height of this drop down list to view the desired number of combo items. I tried using MoveWindow API int ListHeight; ListHeight=SendMessage(Combo.hWnd,CB_GETITEMHEIGHT,0, 0); ListHeight=ListHeight*(Combo.GetCount()); MoveWindow(Combo.hWnd,Combo.Left,Combo.Top,Combo.Width,ListHeight,1); But does not work as we wish. Thanks for your help.

[Rajkumar R]

combo box contains 3 windows, combo, edit, list. u have to change the height of list, in ur code u r trying to change the height of combo box. u can change the height in resource editor, if u want to change the height programmatically, try setting the size to list window, the handle to list box can be obtained from, CB_GETCOMBOBOXINFO message.

[Iain Clarke Warrior Programmer]

1/ In the resource editor, click on the drop down arrow for the combo box - this will give an outline of the drop down box, and you can change that 2/ Try using CM_SETMINVISIBLE - I've not used this, but it looks useful. 3/ Alternatively, use CB_GETCOMBOBOXINFO to fill in a COMBOBOXINFO structure (don;t forget to fill in it's cbSize first). This will give you the window handle to the List control it uses for the drop down part. You can then use SetWindowPos (NULL, 0,0, cx,cy, SWP_NOMOVE | SWP_NOZORDER); to change the size. I hope that's given you enough ammunition! Iain.

Iain Clarke appearing in spite of being begged not to by CPallini.

[David Crow]

poda wrote:

How to increase the height of this drop down list to view the desired number of combo items.

Employ a smarter combobox.

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[poda]

Thanks for you replys friends. But CB_GETCOMBOBOXINFO is undefined in my system. What SDK should I install to get it work. Please give me the link to update my SDK. The winuser.h header does not have such #define. My system is WinXP with SP2 and SDK is March 2006 Release.

[Rajkumar R]

#if(_WIN32_WINNT >= 0x0501) #define CB_GETCOMBOBOXINFO 0x0164 #endif /* _WIN32_WINNT >= 0x0501 */ is defined like above in winuer.h. define _WIN32_WINNT >= 0x0501. if not found install the latest SDK.