WinDDE: handling of ASCII/Wide char data

WinDDE can now dialog both with applications that require data in ASCII and with applications that require wide char data such as UTF-16. Since GDC 2.22.x, only wide char data were supported. Prior to 2.22.x, WinDDE was only able to handle ASCII. By default, WinDDE will automatically guess what is the best encoding when connecting to the DDE server. However, in some instances the returned information can be misleading. In these cases, you will have to set an optional 'encoding' parameter manually in the following DDE functions: DDEConnect, DDEExecute, DDEPeek and DDEPoke. Possible values are: "UNICODE" and "ASCII". For instance:

CALL ui.Interface.frontCall("WINDDE","DDEPoke", 
 [prog,"Sheet1","R1C1","value","UNICODE"], [res] );