//To create a new Account Ledger using btnAccountLedgerAdd private void btnAccountLedgerAdd_Click(object sender, EventArgs e) { try { if (cmbCashOrBankAcc.SelectedValue != null) { strledgerId = cmbCashOrBankAcc.SelectedValue.ToString(); } else { strledgerId = string.Empty; } frmAccountLedger frmAccountledger = new frmAccountLedger(); frmAccountledger.MdiParent = formMDI.MDIObj; frmAccountLedger open = Application.OpenForms["frmAccountLedger"] as frmAccountLedger; if (open == null) { frmAccountledger.WindowState = FormWindowState.Normal; frmAccountledger.MdiParent = formMDI.MDIObj; frmAccountledger.CallFromMonthlySalaryVoucher(this); } else { open.MdiParent = formMDI.MDIObj; open.BringToFront(); open.CallFromMonthlySalaryVoucher(this); if (open.WindowState == FormWindowState.Minimized) { open.WindowState = FormWindowState.Normal; } } this.Enabled = false; } catch (Exception ex) { MessageBox.Show("MSV29:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information); } }