Takeing a program out of the taskbar?

Can I take a program out of the taskbar? Like say I am running microsoft word or outlook, and I dont want the program to show up in my task bar, is their a way I can take it out of the taskbar?

Code:

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Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Public Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long

Function Hidewin(wintitlesearch as string)
dim xs as string
xs = Findwindow(0, wintitlesearch)
hidewin = ShowWindow(xs, 0)
End Function

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