Unselects a tree column.
SapGui.bdh
SapGuiTreeUnselectColumn( in sControlId : string allownull, 
                          in sColumn    : string,
                          in sTimer     : string optional ) : boolean; 
               	 | Parameter | Description | 
|---|---|
| sControlId | The tree's unique id. | 
| sColumn | Identifier for the column to be unselected. | 
| sTimer | Timer name used for measurements. | 
transaction TMain
  var
    sConnID : string;
  begin
    // Connecting to SAP
    sConnID := SapGuiOpenConnection( " /SAP_CODEPAGE=1100 /FULLMENU 10.5.2.132 0 /3");
    SapGuiSetActiveConnection(sConnID);
    SapGuiSetActiveSession("ses[0]");
    // SAP
    SapGuiSetActiveWindow("wnd[0]", "SAP", SAPGUI_MATCH_ExactNoCase);
    SapGuiWindowAction(SAPGUI_WND_MAXIMIZE);
    SapGuiLogon("ddic", "*******", "000", "");
    SapGuiTreeUnselectColumn("/usr/tab/tree", "COL894");
  end TMain;