when debugging my code, at first, there was no error. but when, i let my program running for several minutes this error popped out. AccessViolationException was Unhandled Attempted to read or write protected memory. This is often an ind ...

Hi guys. I am hoping someone would be able to help me with this project I am working on. I have an excel file that my vb project reads and writes to. The text from textbox1.text is stored to this excel file in cell(1,1). 1) How can I ...

Hi guys. Been a while since I have asked anything here and the same amount of time since I worked with VB2008. I have decided to make a program for my uncle and then try to sell it to a larger company if it works the way I think it can. ...

i have three textbox for that vat,discount and grandtotal

i have an application and it gives me error on this line: Me.TableAdapterManager.UpdateAll(Me.T_Database1DataSet) that the error is this: Update requires a valid UpdateCommand when passed DataRow collection with modified rows. now if ...

I want to pick a value from a DateTimePicker in 'MM/dd/yyyy hh:mm tt' format, add 00 as second with it, store it in a DateTime variable and save it to database. Suppose if I pick the value 05/28/2010 9:25 AM or 05/28/2010 9:25:34 AM from th ...

I'm trying to match a certain DateTime value with the current system DateTime. I have a timer and a label on a form. Timer interval is set to 1000. When the form loads, the timer starts ticking. As soon as the current DateTime matches the v ...

How can I get the position of a certain cell of a datagridview. To be specific I don't want the mouse coordinates. Suppose I have a datagridview with Name (ReadOnly), ID and TransDate columns and I want to popup a tiny lookup form when the ...

I need some help to get started with a project. I have been charged with the task of writing a windows app that can do a couple of things... 1) Query the network to give the user a list of users that are logged on to the various machines i ...

Hello all. I am designing a program that will search for a specific .exe because people who try to find it themselves have a hard time. I came across the following code : [code]Private Declare Function GetLogicalDriveStrings _ Lib " ...