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This structure informs Windows CE of the dimensions of an owner-drawn control or menu item. This allows Windows CE to process user interaction with the control correctly.
typedef struct tagMEASUREITEMSTRUCT {
UINT
CtlType
;
UINT
CtlID
;
UINT
itemID
;
UINT
itemWidth
;
UINT
itemHeight
;
DWORD
itemData
;
} MEASUREITEMSTRUCT;
Members
- CtlType
- Specifies the control type. It can be one of the following
values:
Value Description ODT_BUTTON Owner-drawn button ODT_LISTVIEW Owner-draw list view control ODT_MENU Owner-drawn menu - CtlID
- Identifier of the combo box, list box, or button. This member is not used for a menu.
- itemID
- Identifier for a menu item or the position of a list box or combo box item. This value is specified for a list box only if it has the LBS_OWNERDRAWVARIABLE style; this value is specified for a combo box only if it has the CBS_OWNERDRAWVARIABLE style.
- itemWidth
- Specifies the width, in pixels, of a menu item. Before returning from the message, the owner of the owner-drawn menu item must fill this member.
- itemHeight
- Specifies the height, in pixels, of an individual item in a list box or a menu. Before returning from the message, the owner of the owner-drawn combo box, list box, or menu item must fill out this member.
- itemData
- Specifies the application-defined 32-bit value associated with
the menu item. For a control, this member specifies the value last
assigned to the list box or combo box by the
LB_SETITEMDATAor
CB_SETITEMDATAmessage. If the list box or combo box has the
LB_HASSTRINGS or CB_HASSTRINGS style, this value is initially zero.
Otherwise, this value is initially the value passed to the list box
or combo box in the
lParamparameter of one of the following messages:
- CB_ADDSTRING
- CB_INSERTSTRING
- LB_ADDSTRING
-
LB_INSERTSTRING
Remarks
Windows CE does not support owner-drawn combo boxes and list boxes.
The owner window of an owner-drawn control receives a pointer to the MEASUREITEMSTRUCTstructure as the lParamparameter of a WM_MEASUREITEM message. The owner-drawn control sends this message to its owner window when the control is created. The owner then fills in the appropriate members in the structure for the control and returns. This structure is common to all owner-drawn controls.
If an application does not fill the appropriate members of MEASUREITEMSTRUCT, the control or menu item may not be drawn properly.
Requirements
Runs On Versions Defined in Include Link to Windows CE OS 1.0 and later Winuser.h Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
CB_ADDSTRING, CB_INSERTSTRING, CB_SETITEMDATA, LB_ADDSTRING, LB_INSERTSTRING, LB_SETITEMDATA, WM_MEASUREITEM