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CeGetWindowLong (RAPI)

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Windows Embedded CE 6.0 R3

4/8/2010

This function retrieves information about the specified window on a remote Windows Embedded CEā€“based device. CeGetWindowLong also retrieves the 32-bit (long) value at the specified offset into the extra window memory of a window.

Syntax

LONG CeGetWindowLong(
  HWND hWnd, 
  Int nIndex 
);

Parameters

  • hWnd
    Handle to the window and, indirectly, the class to which the window belongs.
  • nIndex
    Specifies the zero-based offset to the value to be retrieved. Valid values are in the range zero through the number of bytes of extra window memory, minus four; for example, if you specified 12 or more bytes of extra memory, a value of 8 would be an index to the third 32-bit integer. To retrieve any other value, specify one of the following values.

    Values Description

    GWL_EXSTYLE

    Retrieves the extended window styles.

    GWL_STYLE

    Retrieves the window styles.

    GWL_WNDPROC

    Retrieves the address of the window procedure, or a handle representing the address of the window procedure. You must use the CallWindowProc function to call the window procedure.

    GWL_ID

    Not supported.

    GWL_USERDATA

    Not supported.

    The following values are also available when the hWnd parameter identifies a dialog box.

    Values Description

    DWL_MSGRESULT

    Retrieves the return value of a message processed in the dialog box procedure.

    DWL_USER

    Retrieves extra information private to the application, such as handles or pointers.

Return Value

The requested 32-bit value indicates success. Zero indicates failure. To get extended error information, call CeGetLastError and CeRapiGetError.

Remarks

The nIndex parameter must be a multiple of 4 bytes.

Unaligned access is not supported.

Requirements

Header rapi.h
Library rapi.lib
Windows Embedded CE Windows CE 3.0 and later
Windows Mobile Pocket PC 2000 and later, Smartphone 2002 and later

See Also

Reference

RAPI Functions