COMBOBOX id, x, y, width, height[, style]The COMBOBOX statement creates a combination box control (a combo box). A combo box consists of either a static text box or an edit box combined with a list box. The list box can be displayed at all times or pulled down by the user. If the combo box contains a static text box, the text box always displays the selection (if any) in the list box portion of the combo box. If it uses an edit box, the user can type in the desired selection; the list box highlights the first item (if any) that matches what the user has entered in the edit box. The user can then select the item highlighted in the list box to complete the choice. In addition, the combo box can be owner-drawn and of fixed or variable height.
id
Specifies the control identifier. This value must be an integer in the range 0 through 65,535 or a simple expression that evaluates to a value in that range.
x
Specifies the x-coordinate of the left side of the control relative to the left side of the dialog box. This value must be an integer in the range 0 through 65,535 or an expression consisting of integers and the addition (+) or subtraction (–) operator. The coordinate is assumed to be in dialog units and is relative to the origin of the dialog box, window, or control containing the specified control.
y
Specifies the y-coordinate of the top side of the control relative to the top of the dialog box. This value must be an integer in the range 0 through 65,535 or an expression consisting of integers and the addition (+) or subtraction (–) operator. The coordinate is assumed to be in dialog units and is relative to the origin of the dialog box, window, or control containing the specified control.
width
Specifies the width of the control. This value must be an integer in the range 1 through 65,535 or an expression consisting of integers and the addition (+) or subtraction (–) operator. The width is in 1/4-character units.
height
Specifies the height of the control. This value must be an integer in the range 1 through 65,535 or an expression consisting of integers and the addition (+) or subtraction (–) operator. The height is in 1/8-character units.
style
Specifies the control styles. This value can be a combination of the COMBOBOX class styles and any of the following styles: WS_TABSTOP, WS_GROUP, WS_VSCROLL, and WS_DISABLED.
You can use the bitwise OR (|) operator to combine styles.
If you do not specify a style, the default style is CBS_SIMPLE and WS_TABSTOP.
The current dialog units are computed from the height and width of the current system font. The GetDialogBaseUnits function returns the dialog units in pixels.
This example creates a combo-box control with a vertical scroll bar:
COMBOBOX 777, 10, 10, 50, 54, CBS_SIMPLE | WS_VSCROLL | WS_TABSTOP