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# vtc.clearMessage

Clears the data in a field.

## Syntax

    vtc.clearMessage ( columnName, rowIndex );

Example | Data Update Functions

## Arguments

name | Comments
--- | ---
columnName | The name of the column.
rowIndex | The row number. The first row has an index of 1.

vtc.clearMessage sets the value of the specified cell to an empty string.

## Return Values

Returns zero on success or one of the Error Codes.

## Parameterization

All string input arguments can be passed using standard parameterization.

## Example

    function callback(){
        var name = 'x' + arguments.callee.caller.arguments.callee.caller;
        lr.message( name.match(',(.*)_wrapper')[1] + '\'s callback arg:');
        for(var i=0 ;i<arguments.length; ++i){
            lr.message( 'arg[' + i + '] type: ' + typeof arguments[i] + ' =' + arguments[i]);
        }
    }

    function Action()
    {
        var handle2 = vtc.connect('321.321.321.321', 8889, vtc.VTOPT_KEEP_ALIVE);
        var handle1 = vtc.connect('123.123.123.123', 8888, vtc.VTOPT_KEEP_ALIVE);
        lr.message('handle1: '+ handle1.handle + ' handle2: ' + handle2.handle);

        if(handle2.handle!==0){
            handle2.createColumn('CID_2', callback );
            handle2.updateMessage('CID_2', 1, 'bbbb', callback );
        }

        if(handle1.handle!==0){
            handle1.createColumn('CID_1', callback );
            handle1.sendMessage('CID_1', '111', callback );
            handle1.sendMessage('CID_1', '2222', callback );
            handle1.updateMessage('CID_1', 1, 'aaaaa', callback );
            handle1.columnSize('CID_1', callback );
            handle1.queryColumn('CID_1', 1, callback );
            handle1.rotateRow(vtc.VTSEND_SAME_ROW, callback );
            handle1.queryRow(1, callback );
            handle1.rotateMessage('CID_1', vtc.VTSEND_SAME_ROW, callback );
            handle1.rotateMessages1('CustomerID,CompanyName', ',', vtc.VTSEND_SAME_ROW, callback );
            handle1.clearColumn('CID_1', callback );
            handle1.getLastError( callback );
            handle1.disconnect( callback );
        }

        if(handle2.handle!==0){
            handle2.disconnect( callback );
        }
    }

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