diff --git a/API/vXboxInterface.cpp b/API/vXboxInterface.cpp
index 6f5e92f..f452233 100644
--- a/API/vXboxInterface.cpp
+++ b/API/vXboxInterface.cpp
@@ -308,6 +308,15 @@ namespace vXboxNS {
 			return XOutputSetState(UserIndex, &g_Gamepad[UserIndex - 1]);
 		}
 
+		VXBOX_API BOOL	__cdecl	 SetBtnGD(UINT UserIndex, BOOL Press)
+		{
+			UINT Btn = XINPUT_GAMEPAD_GUIDE;
+			g_Gamepad[UserIndex - 1].wButtons &= ~Btn;
+			g_Gamepad[UserIndex - 1].wButtons |= Btn*Press;
+			return XOutputSetState(UserIndex, &g_Gamepad[UserIndex - 1]);
+		}
+
+
 		VXBOX_API BOOL	__cdecl	 SetTriggerL(UINT UserIndex, BYTE Value) // Left Trigger
 		{
 			g_Gamepad[UserIndex - 1].bLeftTrigger = Value;
diff --git a/API/vXboxInterface.h b/API/vXboxInterface.h
index e931556..a18be97 100644
--- a/API/vXboxInterface.h
+++ b/API/vXboxInterface.h
@@ -10,6 +10,8 @@
 #define DPAD_RIGHT XINPUT_GAMEPAD_DPAD_RIGHT
 #define DPAD_OFF 0
 
+#define XINPUT_GAMEPAD_GUIDE 0x0400 // Undocumanted Guide button
+
 #ifdef STATIC_LIB
 #undef VXBOX_API
 #define VXBOX_API
@@ -43,7 +45,8 @@ extern "C"
 	VXBOX_API BOOL	__cdecl	 SetBtnRT(UINT UserIndex, BOOL Press); // Right Thumb/Stick
 	VXBOX_API BOOL	__cdecl	 SetBtnLB(UINT UserIndex, BOOL Press); // Left Bumper
 	VXBOX_API BOOL	__cdecl	 SetBtnRB(UINT UserIndex, BOOL Press); // Right Bumper
- 	VXBOX_API BOOL	__cdecl	 SetTriggerL(UINT UserIndex, BYTE Value); // Left Trigger
+	VXBOX_API BOOL	__cdecl	 SetBtnGD(UINT UserIndex, BOOL Press); // Guide Button (Undocumanted)
+	VXBOX_API BOOL	__cdecl	 SetTriggerL(UINT UserIndex, BYTE Value); // Left Trigger
  	VXBOX_API BOOL	__cdecl	 SetTriggerR(UINT UserIndex, BYTE Value); // Right Trigger
 	VXBOX_API BOOL	__cdecl	 SetAxisX(UINT UserIndex, SHORT Value); // Left Stick X
 	VXBOX_API BOOL	__cdecl	 SetAxisY(UINT UserIndex, SHORT Value); // Left Stick Y