private void getPrinterStatusButton_Click(object sender, EventArgs e) { long lResult = LKPrint.PrinterSts(); switch (lResult) { case LKPrint.LK_STS_NORMAL: MessageBox.Show("No Error", "OK", MessageBoxButtons.OK); break; case LKPrint.LK_STS_COVEROPEN: MessageBox.Show("Cover Open", "ERROR", MessageBoxButtons.OK); break; case LKPrint.LK_STS_PAPERNEAREMPTY: MessageBox.Show("Paper Near Empty", "ERROR", MessageBoxButtons.OK); break; case LKPrint.LK_STS_PAPEREMPTY: MessageBox.Show("Paper Empty", "ERROR", MessageBoxButtons.OK); break; case LKPrint.LK_STS_POWEROFF: MessageBox.Show("Power Off", "ERROR", MessageBoxButtons.OK); break; } }