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GweBypassCoredllThunk_t::GetWindowLongW_I (Windows Embedded CE 6.0)

  • Article

1/6/2010

This method retrieves information about the specified window. GweBypassCoredllThunk_t::GetWindowLongW_I also retrieves the 32-bit (long) value at the specified offset into the extra window memory of a window.

Syntax

static LONG WINAPI GetWindowLongW_I(
  HWND hwndThis,
  int nIndex
);

Parameters

  • hwndThis
    [in] Handle to the window and, indirectly, the class to which the window belongs.

  • nIndex
    [in] Integer that 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. The following table shows other possible values.

    Value 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

    Retrieves the 32-bit value associated with the window. Each window has a corresponding 32-bit value intended for use by the application that created the window. Windows CE 2.0 and later support this value, but Windows CE 1.0 and 1.01 do not.

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

    Value 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 GetLastError.

Remarks

This method is an internal version of the GetWindowLong function.

The nIndex parameter must be a multiple of 4 bytes.

Unaligned access is not supported.

Requirements

Header gwebypasscoredllthunk.hpp
Windows Embedded CE Windows CE .NET 4.0 and later

See Also

Reference

GweBypassCoredllThunk_t
CallWindowProc
GetWindowLong
RegisterClass
GweBypassCoredllThunk_t::SetParent_I
GweBypassCoredllThunk_t::SetWindowLongW_I
WNDCLASS