Public Overloads Sub SetCellA1Async( _
   ByVal sessionId As String, _
   ByVal sheetName As String, _
   ByVal rangeName As String, _
   ByVal cellValue As Object, _
   ByVal userState As Object _
) 

Dim instance As ExcelService
Dim sessionId As String
Dim sheetName As String
Dim rangeName As String
Dim cellValue As Object
Dim userState As Object
 
instance.SetCellA1Async(sessionId, sheetName, rangeName, cellValue, userState)

public void SetCellA1Async( 
   string sessionId,
   string sheetName,
   string rangeName,
   object cellValue,
   object userState
)