C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool    ControlService( IntPtr         hService,
                       SERVICE_CONTROL    dwControl,
                       ref SERVICE_STATUS    lpServiceStatus
                                                    );

VB Signature:

Declare Function ControlService Lib "advapi32.dll" (ByVal hService As Long, ByVal lControlCode As Long, lpServiceStatus As SERVICE_STATUS) As Boolean

User-Defined Types:

[Flags]
public enum SERVICE_CONTROL : uint
{
    STOP           = 0x00000001,
    PAUSE          = 0x00000002,
    CONTINUE           = 0x00000003,
    INTERROGATE        = 0x00000004,
    SHUTDOWN           = 0x00000005,
    PARAMCHANGE        = 0x00000006,
    NETBINDADD         = 0x00000007,
    NETBINDREMOVE      = 0x00000008,
    NETBINDENABLE      = 0x00000009,
    NETBINDDISABLE     = 0x0000000A,
    DEVICEEVENT        = 0x0000000B,
    HARDWAREPROFILECHANGE  = 0x0000000C,
    POWEREVENT         = 0x0000000D,
    SESSIONCHANGE      = 0x0000000E
}

[StructLayout(LayoutKind.Sequential)]
public struct SERVICE_STATUS
{
    SC_SERVICE_TYPE        dwServiceType;  
    SERVICE_STATE        dwCurrentState;  
    SERVICE_ACCEPT        dwControlsAccepted;  
    int            dwWin32ExitCode;  
    int            dwServiceSpecificExitCode;  
    uint            dwCheckPoint;  
    uint            dwWaitHint;
}

public enum SERVICE_STATE : uint
{
    SERVICE_STOPPED            = 0x00000001,
    SERVICE_START_PENDING          = 0x00000002,
    SERVICE_STOP_PENDING           = 0x00000003,
    SERVICE_RUNNING            = 0x00000004,
    SERVICE_CONTINUE_PENDING           = 0x00000005,
    SERVICE_PAUSE_PENDING          = 0x00000006,
    SERVICE_PAUSED             = 0x00000007
}

[Flags]
public enum SERVICE_ACCEPT : uint
{
    STOP            = 0x00000001,
    PAUSE_CONTINUE      = 0x00000002,
    SHUTDOWN        = 0x00000004,
    PARAMCHANGE         = 0x00000008,
    NETBINDCHANGE       = 0x00000010,
    HARDWAREPROFILECHANGE   = 0x00000020,
    POWEREVENT          = 0x00000040,
    SESSIONCHANGE       = 0x00000080,
}

Notes:

None.

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