In this exercise, you will create a solution that works with two tables having a master/detail relationship. The first table contains employee records and the second table contains payroll transaction records for each employee. • Configure the form so that it appears on the center of the desktop when the solution is run. Also, configure the form so that the user cannot resize it. • Using the OleDbConnection and OleDbDataAdapter controls, create a connection to the database. Use two Old DbDataAdapter control instances to get the data from the two respective tables. Generate one DataSet based on the two DataAdapters. Write the necessary statements in the frmMain_Load event handler to populate the DataSet. • Using the XML Designer, define a DataRelation to link the field named fldEmployeelD between the two tables. • Create an instance of the ListBox control. Set the necessary properties so that the ListBox control will display the field fldName in the table named tblEmplovees. • Create an instance of the DataGrid control on the form. Configure the DataGrid control instance so that it displays records from the table named tblPavroll. Use the DataRelation object to accomplish this task. Make sure that the DataGrid control instance displays the payroll records for the currently selected employee. • Format the DataGrid so that the column header names are the same as the ones shown in the Figure. Make the background color of the selected row light blue. Also, make sure that the rows have an alternating color. • Write the necessary code to calculate the number of transaction, total gross pay, total withholding, and total net pay for the currently selected employee. Display the results in Label control instances at the bottom at the form. Format the output as currency. Right-justify the output in the Label control instances. • Create an Exit button for the solution. In the Click event handler for the button, display a message box to get confirmation from the user before exiting the solution. • Create an Update button that will allow the user to save any changes made to the DataGrid back to the database. Write the necessary code for the button. Allow the user to add, change, and delete records.
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Windows XP Visual Basic