2018-09-08 01:26:45 +08:00
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#Region "Microsoft.VisualBasic::70b1299aaf4649ed5572809387bb9ae1, Microsoft.VisualBasic.Core\ApplicationServices\Tools\Win32\PriorityClass.vb"
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2018-08-02 20:14:48 +08:00
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module PriorityClass
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' Function: PriorityClass
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' /********************************************************************************/
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#End Region
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Namespace Win32
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''' <summary>
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''' Process priority class helper.
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''' </summary>
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Public Module PriorityClass
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''' <summary>
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''' 当前进程句柄
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''' </summary>
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''' <returns></returns>
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Public Declare Function GetCurrentProcess Lib "kernel32" () As Integer
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Public Declare Function SetPriorityClass Lib "kernel32" (hProcess As Integer, dwPriorityClass As Integer) As Integer
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''' <summary>
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''' 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
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''' </summary>
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Public Const IDLE_PRIORITY_CLASS = &H40
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''' <summary>
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''' 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
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''' </summary>
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Public Const HIGH_PRIORITY_CLASS = &H80
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''' <summary>
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''' 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
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''' </summary>
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Public Const NORMAL_PRIORITY_CLASS = &H20
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''' <summary>
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''' Set Priority Class for current process.
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''' </summary>
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''' <param name="priority"><see cref="IDLE_PRIORITY_CLASS"/>, <see cref="HIGH_PRIORITY_CLASS"/>, <see cref="NORMAL_PRIORITY_CLASS"/></param>
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''' <returns></returns>
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Public Function PriorityClass(priority As Integer) As Boolean
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Dim CurrentProcesshWnd As Integer = GetCurrentProcess
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If (SetPriorityClass(CurrentProcesshWnd, priority) = 0) Then
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Return False
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Else
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Return True
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End If
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End Function
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End Module
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End Namespace
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