Setwindowlongptr windows ce

The following values are also available when the hWnd parameter identifies a dialog box. The previous value of the specified bit integer indicates success. Zero indicates failure. To get extended error information, call GetLastError. If the previous value of the specified bit integer is zero, and the function succeeds, the return value is zero, but the function does not clear the last error information.

This makes it difficult to determine success or failure. To deal with this, you should clear the last error information by calling SetLastError 0 before calling SetWindowLong. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Changes an attribute of the specified window.

The function also sets a value at the specified offset in the extra window memory. A handle to the window and, indirectly, the class to which the window belongs. The SetWindowLongPtr function fails if the process that owns the window specified by the hWnd parameter is at a higher process privilege in the UIPI hierarchy than the process the calling thread resides in. The zero-based offset to the value to be set. To set any other value, specify one of the following values.

If the function fails, the return value is zero. For Windows CE, the byte offset but must be a multiple of 4 bytes. The following values are also available when the hWnd parameter identifies a dialog box:.

The previous value of the specified bit integer indicates success. Zero indicates failure. To get extended error information, call GetLastError. If the previous value of the specified bit integer is zero, and the function succeeds, the return value is zero, but the function does not clear the last error information. This makes it difficult to determine success or failure. Privacy policy.

Changes an attribute of the specified window. The function also sets the bit long value at the specified offset into the extra window memory. The zero-based offset to the value to be set. Valid values are in the range zero through the number of bytes of extra window memory, minus the size of an integer.

To set any other value, specify one of the following values. You cannot change this attribute if the window does not belong to the same process as the calling thread. If the function succeeds, the return value is the previous value of the specified bit integer. If the function fails, the return value is zero. To get extended error information, call GetLastError.

If the previous value of the specified bit integer is zero, and the function succeeds, the return value is zero, but the function does not clear the last error information.