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CheckRemoteDebuggerPresent (kernel32)
This function determines whether the specified process is being debugged.

C# Signature:

[DllImport("Kernel32.dll", SetLastError = true, ExactSpelling = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool CheckRemoteDebuggerPresent(SafeHandle hProcess, [MarshalAs(UnmanagedType.Bool)]ref bool isDebuggerPresent);

VB Signature:

Declare Function CheckRemoteDebuggerPresent Lib "kernel32.dll"
(ByVal hProcess As Long, ByVal fResult As Boolean) As Boolean

Boo Signature:

[DllImport("kernel32.dll", SetLastError : true)]
def CheckRemoteDebuggerPresent(hProcess as IntPtr, ref DebuggerPresent as bool) as bool:

Return Value:

If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. To get extended error information, call GetLastError.


Checks for RemoteDebugger on the 'hProcess'. The "remote" in CheckRemoteDebuggerPresent does not imply that the debugger necessarily resides on a different computer; instead, it indicates that the debugger resides in a separate and parallel process. Use the IsDebuggerPresent function to detect whether the calling process is running under the debugger.

You may need to have the SE_DEBUG_NAME privilege on the specified process or you will receive ERROR_ACCESS_DENIED (0x5)

See Also:

Sample Code:

Public Class Form1
    Declare Function CheckRemoteDebuggerPresent Lib "kernel32.dll" _  
    (ByVal hProcess As Long, ByVal fResult As Boolean) As Boolean
        Dim bool As Boolean
        Dim proc As Process = Process.GetCurrentProcess()

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
            Debug.Print(CStr(CheckRemoteDebuggerPresent(proc.Handle, bool)))
    End Sub
End Class

[CheckRemoteDebuggerPresent] on MSDN

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