CreateToolhelp32Snapshot produced ERROR_NOT_ENOUGH_MEMORY

Question

In Windows Mobile 6 Professional Device, I am trying to call the CreateToolhelp32Snapshot function, but getting an ERROR_NOT_ENOUGH_MEMORY error.

I am already using the flag TH32CS_SNAPNOHEAPS as suggested here. The code is C# .NET 3.5 Compact Edition.

My goal is to find a process by it's name.

private const int TH32CS_SNAPPROCESS = 0x00000002;
private const int TH32CS_SNAPNOHEAPS = 0x40000000;
private const int INVALID_HANDLE_VALUE = -1;

[DllImport("toolhelp.dll", SetLastError = true)]
private static extern IntPtr CreateToolhelp32Snapshot(uint flags, uint processID);

public static IntPtr FindProcessPID(string fullpath)
{
    fullpath = fullpath.ToLower();
    IntPtr snapshot_handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS | TH32CS_SNAPNOHEAPS, 0);

    if ((Int32)snapshot_handle == INVALID_HANDLE_VALUE)
        throw new Win32Exception(Marshal.GetLastWin32Error(), "CreateToolhelp32Snapshot failed.");

Thanks.

Answer 1

The only diff to my code seems the hard code process ID in your call to CreateToolhelp32Snapshot:

        uint procID = 0;
        IntPtr pHandle = CreateToolhelp32Snapshot(SnapshotFlags.Process | SnapshotFlags.NoHeaps, procID);

Web page of my CpuMon: http://www.hjgode.de/wp/2012/12/14/mobile-development-a-remote-cpu-monitor-and-cpu-usage-analysis/

full code at: http://code.google.com/p/win-mobile-code/source/browse/trunk/cpumon/ProcessorUsage/CpuMon2/Process.cs