String GetBase64String(nLeft As Number, nTop As Number, nWidth As Number, nHeight As Number)
| Parameter | Type | Required | Description |
| nLeft | Number | No | Optional parameter which specifies the left coordinate of the rectangle to return. |
| nTop | Number | No | Optional parameter which specifies the top coordinate of the rectangle to return. |
| nWidth | Number | No | Optional parameter which specifies the width of the rectangle to return. |
| nHeight | Number | No | Optional parameter which specifies the height of the rectangle to return. |