Index: precomp.h
===================================================================
--- precomp.h	(revision 50273)
+++ precomp.h	(working copy)
@@ -39,6 +39,14 @@
 
 #include <wine/debug.h>
 WINE_DEFAULT_DEBUG_CHANNEL(cmd);
+
+#define CMD_TRACE_DYNAMIC
+#ifdef CMD_TRACE_DYNAMIC
+#undef TRACE
+void			cmd_trace(char *szFormat, ...);
+#define TRACE	cmd_trace
+#endif
+
 #ifdef UNICODE
 #define debugstr_aw debugstr_w
 #else
Index: set.c
===================================================================
--- set.c	(revision 50273)
+++ set.c	(working copy)
@@ -38,7 +38,29 @@
 
 #ifdef INCLUDE_CMD_SET
 
+#ifdef CMD_TRACE_DYNAMIC
+/*
+ *  State can be controlled by setting an environment variable:  set CMDTRACE=on
+ */ 
+BOOL 	CMD_TRACE_STATE = FALSE;
 
+/*
+ *  Depending on state, output the trace messages to the console
+ *
+ */
+VOID cmd_trace(char *szFormat, ...)
+{
+	if (CMD_TRACE_STATE) {
+		va_list arg_ptr;
+		
+		va_start (arg_ptr, szFormat);
+		vprintf(szFormat, arg_ptr);
+		va_end (arg_ptr);
+	}
+}
+#endif
+
+
 /* initial size of environment variable buffer */
 #define ENV_BUFFER_SIZE  1024
 
@@ -156,6 +178,13 @@
 		}
 
 		*p++ = _T('\0');
+#ifdef CMD_TRACE_DYNAMIC		
+		/* check for dynamic TRACE on off */
+		if (_tcsicmp (param, _T("CMDTRACE")) == 0)
+		{
+			CMD_TRACE_STATE = ( _tcsicmp (p, _T("on")) == 0 ) ? TRUE : FALSE ;
+		}
+#endif
 		if (!SetEnvironmentVariable(param, *p ? p : NULL))
 		{
 			nErrorLevel = 1;