INFO: EM_SETHANDLE and EM_GETHANDLE Messages Not Supported

MORE INFORMATION

The EM_GETHANDLE and EM_SETHANDLE messages are used to retrieve and set the handle of the memory currently allocated for a multiline edit control's text. USER under Windows 95 is a mixture of 16-bit and 32-bit code, so edit controls created inside a 32-bit application cannot use these messages to retrieve or set the handles. Trying to do so causes the application to cause a general protection (GP) fault and thereby be terminated by the System.

One workaround that involves a little code modification is to use the GetWindowTextLengt(), GetWindowText(), and SetWindowText() APIs to retrieve and set the text in a edit control.

NOTE: USER is almost completely 16-bit, so 32-bit applications thunk down to the 16-bit USER. Also note that the EM_GETHANDLE and EM_SETHANDLE messages cannot be used with Win32s-based applications either.