Accessing a MFC combo box

Posted on 2004-08-04
Last Modified: 2013-11-20

1. how do I get the pointer/reference of a combo box object that I added in the MS VS 2003 GUI editor and that has got the ID "IDC_COMBO1"?

2. how do put some static strings into it's list?

3. how do I restrict the combo box to allow only the strings from the list (no manual typing)?

BTW, I'm a absolutely new to MFC and win32 but have got some C++ expirience.

Thank you for efforts.
Question by:x4u
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LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 350 total points
ID: 11718075
go to ClassWizard (Ctrl-W)
select your dialog object
select the "member variables" tab
your control label will appear, select it
press the "Add variable" button, another dialog will appear
here is the trick: write a variable name and in the "category" choose "control"
now your dialog has a proper initialized member you can use to pass any message

LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 350 total points
ID: 11718135
to avoid user to "type" another string, just go to dialog GUI editor, select combo box properties, and change style to "Drop list" (not drop down)

LVL 44

Assisted Solution

AndyAinscow earned 150 total points
ID: 11718236
After creating your control var - m_cmboXYZ you can add strings like this


The default behaviour is to sort them, you can stop this in the resource editor - it's one of the settings.
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LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 350 total points
ID: 11718258
2. how do put some static strings into it's list?

In the resource editor you can insert your static list in combobox properties, "data" tab.
LVL 11

Author Comment

ID: 11719182
Thank you, adding items works fine now.

But the drop down list height seems to be zero, it is appears only a thick black line. I can browse the items with the cursor keys but how do I resize the list box height to a reasonable height? Can I set set it to resize automatically somehow?

BTW, I get is the same behaviour with AddString and when I type the strings into data properties field.
LVL 55

Accepted Solution

Jaime Olivares earned 350 total points
ID: 11719261
About the control height, it is a common error:
Comboboxes have 2 height: Edit portion height and drop-down list height. You have not resized the second.

Go to dialog GUI editor, select your combobox, the bounding rectangle will be selected, now press on the drop-down arrow, a diferent rectangle will be selected, drag lower boundary to desired size. That's all.
LVL 11

Author Comment

ID: 11719424
Ahh, cool thanks. I would never have figuered this out myself. ;-)

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