0x2F appears to be a path query

Author: Xaymar

vst.h

@@ -837,8 +837,24 @@ enum VST_HOST_OPCODE {
 	/** @sa VST_HOST_OPCODE_2C */
 	VST_HOST_OPCODE_PARAM_UNLOCK = 0x2C,
 
+	//--------------------------------------------------------------------------------
+	// VST 2.2
+	//--------------------------------------------------------------------------------
+
 	VST_HOST_OPCODE_2D = 0x2D,
+
 	VST_HOST_OPCODE_2E = 0x2E,
+
+	/** 
+	 * When queried by the plug-in shortly after @ref VST_EFFECT_OPCODE_PROGRAM_LOAD it often crashes compatible hosts
+	 * with a memory access exception. This exception can be controlled with p_ptr but it's unclear what that is
+	 * pointing at so far. In the event that it doesn't crash the memory address we pointed at changes to a path.
+	 * 
+	 * @todo Figure out what p_ptr is.
+	 * @note (VST 2.2+) Available from VST 2.2 onwards.
+	 * @deprecated (VST 2.4+) Deprecated from VST 2.4 onwards.
+	 * @param p_ptr A pointer to something
+	 */
 	VST_HOST_OPCODE_2F = 0x2F,
 
 	//--------------------------------------------------------------------------------