hwnd (HWND)

Focus window handle.

The handle of the control window that is to receive the input focus.

pcreate (PVOID)

Application-defined data area.

This points to the data area and is passed by the WinLoadDlg, WinCreateDlg, and WinDlgBox functions in their parameter.

This parameter MUST be a pointer rather than a long.

The first 2 bytes in the data referenced by this pointer should be the total size of the data referenced by the pointer, (for example, see the ENTRYFDATA or the FRAMECDATA structure). PM requires this information to enable it to ensure that the referenced data is accessible to both 16-bit and 32-bit code.

rc (BOOL)

Focus set indicator.

TRUE

Focus window is changed. The dialog procedure can change the window to receive the focus, by issuing a WinSetFocus whose specifies the handle of another control within the dialog box.
FALSE
Focus window is not changed.

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