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setprocessworkingsetsize (kernel32)
 
.
Summary

C# Signature:

[DllImport("kernel32.dll")]
static extern bool SetProcessWorkingSetSize(IntPtr hProcess, UIntPtr
   dwMinimumWorkingSetSize, UIntPtr dwMaximumWorkingSetSize);

VB.NET Signature:

     Private Declare Function SetProcessWorkingSetSize Lib "kernel32.dll" (ByVal hProcess As IntPtr, ByVal dwMinimumWorkingSetSize As Int32, ByVal dwMaximumWorkingSetSize As Int32) As Int32

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Might be better written using int instead of UInt as -1 is a valid value for dwMaximumWorkingSetSize and dwMinimumWorkingSetSize. See Sample Code.

Sample Code:

//sample is probably a bad idea, but it will "trim down" the memory footprint of a .Net App (or at least the value reflected in Task Manager).

C#

   public class MemoryManagement{
        [DllImport("kernel32.dll")]
        public static extern bool SetProcessWorkingSetSize( IntPtr proc, int min, int max );

        public void FlushMemory() {
            GC.Collect() ;
            GC.WaitForPendingFinalizers() ;
            if(Environment.OSVersion.Platform == PlatformID.Win32NT) {
                SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1) ;
            }
        }
   }

VB.NET

     Friend Sub ReleaseMemory()
      Try
           GC.Collect()
           GC.WaitForPendingFinalizers()
           If Environment.OSVersion.Platform = PlatformID.Win32NT Then
            SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1)
           End If
      Catch
      End Try
     End Sub    

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