VB设置进程优先级
http://topic.csdn.net/t/20060401/19/4656391.html
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function SetPriorityClass Lib "kernel32" (ByVal hProcess As Long, ByVal dwPriorityClass As Long) As Long
Const IDLE_PRIORITY_CLASS = &H40 '新进程应该有非常低的优先级——只有在系统空闲的时候才能运行。基本值是4
Const HIGH_PRIORITY_CLASS = &H80 '新进程有非常高的优先级，它优先于大多数应用程序。基本值是13。注意尽量避免采用这个优先级
Const NORMAL_PRIORITY_CLASS = &H20 '标准优先级。如进程位于前台，则基本值是9；如在后台，则优先值是7
Dim CurrentProcesshWnd As Long '当前进程句柄
Private Sub Form_Load()
CurrentProcesshWnd = GetCurrentProcess
If (SetPriorityClass(CurrentProcesshWnd, HIGH_PRIORITY_CLASS) = 0) Then
MsgBox "设置当前进程优先级为高。失败！"
Else
MsgBox "设置当前进程优先级为高。成功！"
End If
End Sub
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