devxlogo

Change the width of the dropdown portion of a ComboBox

Change the width of the dropdown portion of a ComboBox

Why Trust Us

The ComboBox control doesn’t expose any property that lets you to control the width of its list area, but this can be easily accomplished by sending it the CB_SETDROPPEDWIDTH message, and passing the new length in pixel in wParam:

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal _    hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _    lParam As Any) As LongConst CB_SETDROPPEDWIDTH = &H160' Set the width of the list area of a ComboBox (in pixels)Sub SetComboDropDownWidth(ComboBox As ComboBox, ByVal lWidth As Long)    SendMessage ComboBox.hWnd, CB_SETDROPPEDWIDTH, lWidth, ByVal 0&End Sub

For example, you can use the above reusable routine to set a ComboBox’s drop down list width to 200 pixels using the following line of code:

SetComboDropDownWidth Combo1, 200

See also  Professionalism Starts in Your Inbox: Keys to Presenting Your Best Self in Email
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist

Charlie Frank

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.
View Author
Show More