Checks a check box in a grid control.
SapGui.bdh
SapGuiGridModifyCheckbox( in sControlId : string allownull, 
                          in nRow       : number, 
                          in sCol       : string,
                          in bChecked   : boolean ) : boolean; 
               	 | Parameter | Description | 
|---|---|
| sControlId | The grid control's unique id. | 
| nRow | The cell's row | 
| sCol | The column id of the cell. | 
| bChecked | If this parameter is "true", the checkbox will be checked. | 
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", "");
    SapGuiGridModifyCheckbox("/usr/tab/chk", 0, "COL03", true );
  end TMain;