////// method to set a specified printer as the system's default printer /// /// name of the printer we want to be default///Returns true if successfull ///Throws exception if printer not installed public bool SetPrinterToDefault(string printer) { //path we need for WMI string queryPath = "win32_printer.DeviceId='" + printer + "'"; try { //ManagementObject for doing the retrieval ManagementObject managementObj = new ManagementObject(queryPath); //ManagementBaseObject which will hold the results of InvokeMethod ManagementBaseObject obj = managementObj.InvokeMethod("SetDefaultPrinter", null, null); //if we're null the something went wrong if (obj == null) throw new Exception("Unable to set default printer."); //now get the return value and make our decision based on that int result = (int)obj.Properties["ReturnValue"].Value; if (result == 0) return true; else return false; } catch (Exception ex) { MessageBox.Show(ex.Message); return false; } }
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