VB6 Minimize Memory Usage Shown in Task Manager

Posted on 2010-01-02
Medium Priority
Last Modified: 2012-05-08
Dear Experts,

I am aware that the memory use shown in Windows Task Manager can be misleading and lowering this number is partially "cosmetic", but I am trying to use the old trick of minimizing and then normal-sizing my app to reduce the number. This works great when done manually, but not very well when I perform it programmatically, which is my goal.

How can I do this correctly, or is there a better way?

Question by:ttobin333

Expert Comment

ID: 26164045
I have no idea what you're talking about and I am a Microsoft Certified Professional in VB6, in particular.

What do you mean "the old trick"? What exactly are you doing to lower memory usage and then "normal-size" (do you mean "normalize")?

Thank you,
LVL 10

Accepted Solution

LMiller7 earned 2000 total points
ID: 26164141
I think you may be looking for the SetProcessWorkingSetSize() API function. This function can reduce memory consumption the same way  that minimizing an app will. It is largely cosmetic but may be useful in some cases. I don't know that much about VB6 so can't help with how to use it. Do note that the parameters passed to the function are 64 bit integers.


Author Comment

ID: 26164146
Jon500, that's not a very nice tone, but let me explain.

When my app (like most) launches, it uses more memory than when it is idle, but the task manager processes tab shows the high initial memory usage (even though I realize that this can be freed up when needed by other apps). When you minimize the app then restore it, the memory usage number in task manager goes way down. Try it, it works with most VB apps

I am trying to achieve this programmatically.

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Expert Comment

ID: 26164163
I do apologize for what appeared to be a bad tone. It wasn't my intention. I honestly did not know "the old trick". Thank you for explaining. Your question is far clearer now, in my opinion, and I think it will enable other experts to chime in with some helpful advice.


Author Comment

ID: 26164204
No problem, Jon. Thanks for your response.

Author Closing Comment

ID: 31672049
That's it, thanks!
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 26164526
Don't have VB6 on my machine anymore...you could also try:
    Private Const SW_MINIMIZE As Long = 6
    Private Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hWnd As Long, ByVal nCmdShow As Long) As Long
        ShowWindow Me.hWnd, SW_MINIMIZE

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