Sets the tree column width.
SapGui.bdh
SapGuiTreeSetColumnWidth( in sControlId : string allownull, 
                          in sColumn    : string, 
                          in nWidth     : number,
                          in sTimer     : string optional ) : boolean; 
               	 | Parameter | Description | 
|---|---|
| sControlId | The tree's unique id. | 
| sColumn | The identifier for the column. | 
| nWidth | The width to be set. | 
| sTimer | Timer name used for measurements. | 
transaction TMain
  var
    bCheck : boolean;
    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", "");
    bCheck := SapGuiTreeSetColumnWidth("/usr/tab/mtree", "OBIDU", 233 );
  end TMain;