diff --git a/pykd/dbgcmd.cpp b/pykd/dbgcmd.cpp
new file mode 100644
index 0000000..5dc55bd
--- /dev/null
+++ b/pykd/dbgcmd.cpp
@@ -0,0 +1,132 @@
+#include "stdafx.h"
+
+#include <boost/format.hpp>
+
+#include "dbgext.h"
+#include "dbgcmd.h"
+#include "dbgexcept.h"
+#include "dbgio.h"
+#include "dbgsystem.h"
+
+///////////////////////////////////////////////////////////////////////////////
+
+std::string
+dbgCommand( const std::wstring &command )
+{
+    HRESULT     hres;
+
+    OutputReader        outReader(  dbgExt->client );
+    {
+        PyThread_StateRestore pyThreadRestore;
+
+        hres = dbgExt->control4->ExecuteWide( DEBUG_OUTCTL_THIS_CLIENT, command.c_str(), 0 );
+    }
+    if ( FAILED( hres ) )
+        throw  DbgException( "IDebugControl::Execute  failed" ); 
+
+    return std::string( outReader.Line() );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+dbgExtensionClass::dbgExtensionClass( const char* path ) : m_path(path)
+{
+    HRESULT     hres;
+
+    hres = dbgExt->control->AddExtension( path, 0, &m_handle );
+    if ( FAILED( hres ) )
+        throw DbgException( "IDebugControl::AddExtension failed" );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+    
+dbgExtensionClass::~dbgExtensionClass()
+{
+    if ( m_handle )
+        dbgExt->control->RemoveExtension( m_handle );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+std::string
+dbgExtensionClass::call( const std::string &command, const std::string params )
+{
+    HRESULT     hres;
+
+    OutputReader        outReader(  dbgExt->client );
+
+    hres = dbgExt->control->CallExtension( m_handle, command.c_str(), params.c_str() );
+    if ( FAILED( hres ) )
+        throw  DbgException( "IDebugControl::CallExtension  failed" ); 
+        
+    return std::string( outReader.Line() );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+std::string
+dbgExtensionClass::print() const
+{
+    return m_handle ? m_path : "";
+}
+
+/////////////////////////////////////////////////////////////////////////////// 
+
+ULONG64
+evaluate( const std::string  &expression )
+{
+    HRESULT             hres;
+    ULONG64             value = 0;
+
+    DEBUG_VALUE  debugValue = {};
+    ULONG        remainderIndex = 0;
+    
+    if ( is64bitSystem() )
+    {
+        hres = dbgExt->control->Evaluate( 
+            expression.c_str(), 
+            DEBUG_VALUE_INT64,
+            &debugValue,
+            &remainderIndex );
+            
+        if (  FAILED( hres ) )
+            throw  DbgException( "IDebugControl::Evaluate  failed" );
+            
+        if ( remainderIndex == expression.length() )
+            value = debugValue.I64;
+    }
+    else
+    {
+        hres = dbgExt->control->Evaluate( 
+            expression.c_str(), 
+            DEBUG_VALUE_INT32,
+            &debugValue,
+            &remainderIndex );
+            
+        if (  FAILED( hres ) )
+            throw  DbgException( "IDebugControl::Evaluate  failed" );
+            
+        if ( remainderIndex == expression.length() )
+            value = debugValue.I32;
+    }      
+
+    return value;
+}
+
+/////////////////////////////////////////////////////////////////////////////// 
+
+void
+breakin()
+{
+    HRESULT     hres;
+
+    {
+        PyThread_StateRestore pyThreadRestore;
+        hres = dbgExt->control->SetInterrupt( DEBUG_INTERRUPT_ACTIVE );
+    }
+
+    if ( FAILED( hres ) )
+        throw DbgException( "IDebugControl::SetInterrupt" );
+}
+
+/////////////////////////////////////////////////////////////////////////////// 
\ No newline at end of file