IsDebuggerPresent function (debugapi.h)

Determines whether the calling process is being debugged by a user-mode debugger.

Syntax

C++
BOOL IsDebuggerPresent();

Return value

If the current process is running in the context of a debugger, the return value is nonzero.

If the current process is not running in the context of a debugger, the return value is zero.

Remarks

This function allows an application to determine whether or not it is being debugged, so that it can modify its behavior. For example, an application could provide additional information using the OutputDebugString function if it is being debugged.

To determine whether a remote process is being debugged, use the CheckRemoteDebuggerPresent function.

Requirements

Requirement Value
Minimum supported client Windows NT Workstation 4.0 [desktop apps | UWP apps]
Minimum supported server Windows NT Server 4.0 [desktop apps | UWP apps]
Target Platform Windows
Header debugapi.h (include Windows.h)
Library Kernel32.lib
DLL Kernel32.dll

See also

CheckRemoteDebuggerPresent

Debugging Functions

OutputDebugString