CeGetWindowLong (RAPI) (Windows Embedded CE 6.0)
1/6/2010
This function retrieves information about the specified window on a remote Windows Embedded CE–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 |