devxlogo

January 1, 2003

Release COM objects immediately

When you use a COM or COM+ from a .NET application and then you set the object reference to Nothing (or let it go out of scope), the object isn’t

Add a slash to directory names

If you have defined a default document for a given IIS virtual directory, any link pointing to the directory will actually point to the default document for that directory. However,

SetWallpaper – Change or remove the desktop wallpaper

Private Declare Function SystemParametersInfo Lib “user32” Alias _ “SystemParametersInfoA” (ByVal uAction As Long, ByVal uParam As Long, _ ByRef lpvParam As Any, ByVal fuWinIni As Long) As LongConst SPI_SETDESKWALLPAPER =

Calculate the product of a field

The SQL language includes the SUM() aggregate function, that evaluates the sum of all the values in a given column, but it doesn’t include a PROD() function that evaluates the

Swap the values of two columns

At times you may need to swap the values of two columns of the same SQL Server table. For example, suppose that you realized that the fname column of the