DFM_WM_MEASUREITEM message

Sent to the owner window of a control or menu item when the control or menu is created.

DFM_WM_MEASUREITEM 

    wParam = (WPARAM);

    lParam = (LPARAM)(LPMEASUREITEMSTRUCT) lpMeasureItem;

            

Parameters

wParam [in]

The value of the CtlID member of the MEASUREITEMSTRUCT structure pointed to by the lpMeasureItem parameter. This value identifies the control that sent the DFM_WM_MEASUREITEM message.

lpMeasureItem [out]

A pointer to a MEASUREITEMSTRUCT structure that contains the dimensions of the owner-drawn control or menu item.

Remarks

When the owner window receives the DFM_WM_MEASUREITEM message, the owner fills in the MEASUREITEMSTRUCT structure pointed to by the lpMeasureItem parameter of the message and returns; this informs the system of the dimensions of the control.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	Shlobj.h