Операция была отменена пользователем. (Исключение из HRESULT: 0x800704C7)

Public Function AddDriver(ByVal DriverName As String, ByVal InfFile As String) As Boolean
    Try
        Dim PRNADMIN As New PRNADMINLib.PrintMaster

        Dim Drv As New PRNADMINLib.Driver
        Drv.ModelName = DriverName
        Drv.InfFile = InfFile
        PRNADMIN.DriverAdd(Drv)
        Return True
    Catch ex As Exception
        MessageBox.Show(ex.Message, frmMain.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
        Return False
    End Try
End Function

public bool AddDriver(string DriverName, string InfFile)
{
    try {
    PRNADMINLib.PrintMaster PRNADMIN = new PRNADMINLib.PrintMaster();

    PRNADMINLib.Driver Drv = new PRNADMINLib.Driver();
    Drv.ModelName = DriverName;
    Drv.InfFile = InfFile;
    PRNADMIN.DriverAdd(Drv);
    return true;
} catch (Exception ex) {
    MessageBox.Show(ex.Message, frmMain.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
    return false;
}
}