I have defined a boolean property as follows:
[Browsable(true), Category(\"Display\"), DefaultValue(false),
WebPartStorage(Storage.Shared), FriendlyName(\"Obe
@Jason, you're correct. The syntax "Browsable", and "Category" are Sharepoint 2003 specific. For SharePoint 2007, it's "WebBrowsable", and "SPWebCategoryName" respectively.
DefaultValue(false) is also SharePoint 2003 specific.
The equivalent in 2007, as far as I know, is to declare it initially beforehand, like this:
private string _strMainFolder = "Reports"; //Here is the default value
[WebBrowsable(true)]
[WebDisplayName("SharePoint List Name")]
[SPWebCategoryName("SharePoint List Name Settings")]
[WebPartStorage(Storage.Shared)]
[WebDescription("You would put the description here.")]
[Personalizable(PersonalizationScope.Shared)]
public string strMainFolder
{
get { return _strMainFolder; }
set { _strMainFolder = value; }
}