diff --git a/Breeder/BR_ReaScript.cpp b/Breeder/BR_ReaScript.cpp
index e7dbc6d9..a2142ccd 100644
--- a/Breeder/BR_ReaScript.cpp
+++ b/Breeder/BR_ReaScript.cpp
@@ -1204,9 +1204,9 @@ void BR_Win32_ScreenToClient(void* hwnd, int xIn, int yIn, int* xOut, int* yOut)
 	WritePtr(yOut, (int)p.y);
 }
 
-int BR_Win32_SendMessage(void* hwnd, int msg, int lParam, int wParam)
+int BR_Win32_SendMessage(void* hwnd, int msg, int wParam, int lParam)
 {
-	return (int)SendMessage((HWND)hwnd, msg, lParam, wParam);
+	return (int)SendMessage((HWND)hwnd, msg, wParam, lParam);
 }
 
 void* BR_Win32_SetFocus(void* hwnd)
diff --git a/Breeder/BR_ReaScript.h b/Breeder/BR_ReaScript.h
index 4de8d874..58855614 100644
--- a/Breeder/BR_ReaScript.h
+++ b/Breeder/BR_ReaScript.h
@@ -126,7 +126,7 @@ int             BR_Win32_MAKEWORD (int low, int high);
 int             BR_Win32_MAKEWPARAM (int low, int high);
 void*           BR_Win32_MIDIEditor_GetActive ();
 void            BR_Win32_ScreenToClient (void* hwnd, int xIn, int yIn, int* xOut, int* yOut);
-int             BR_Win32_SendMessage (void* hwnd, int msg, int lParam, int wParam);
+int             BR_Win32_SendMessage (void* hwnd, int msg, int wParam, int lParam);
 void*           BR_Win32_SetFocus (void* hwnd);
 int             BR_Win32_SetForegroundWindow (void* hwnd);
 int             BR_Win32_SetWindowLong (void* hwnd, int index, int newLong);
diff --git a/ReaScript.cpp b/ReaScript.cpp
index a1b29c21..15f4d9f0 100644
--- a/ReaScript.cpp
+++ b/ReaScript.cpp
@@ -274,7 +274,7 @@ APIdef g_apidefs[] =
 	{ APIFUNC(BR_Win32_MAKEWPARAM), "int", "int,int", "low,high", "[BR] Equivalent to win32 API MAKEWPARAM().", },
 	{ APIFUNC(BR_Win32_MIDIEditor_GetActive), "void*", "", "", "[BR] Alternative to <a href=\"#MIDIEditor_GetActive\">MIDIEditor_GetActive</a>. REAPER seems to have problems with extensions using HWND type for exported functions so all BR_Win32 functions use void* instead of HWND type.", },
 	{ APIFUNC(BR_Win32_ScreenToClient), "void", "void*,int,int,int*,int*", "hwnd,xIn,yIn,xOut,yOut", "[BR] Equivalent to win32 API ClientToScreen().", },
-	{ APIFUNC(BR_Win32_SendMessage), "int", "void*,int,int,int", "hwnd,msg,lParam,wParam", "[BR] Equivalent to win32 API SendMessage().", },
+	{ APIFUNC(BR_Win32_SendMessage), "int", "void*,int,int,int", "hwnd,msg,wParam,lParam", "[BR] Equivalent to win32 API SendMessage().", },
 	{ APIFUNC(BR_Win32_SetFocus), "void*", "void*", "hwnd", "[BR] Equivalent to win32 API SetFocus().", },
 	{ APIFUNC(BR_Win32_SetForegroundWindow), "int", "void*", "hwnd", "[BR] Equivalent to win32 API SetForegroundWindow().", },
 	{ APIFUNC(BR_Win32_SetWindowLong), "int", "void*,int,int", "hwnd,index,newLong", "[BR] Equivalent to win32 API SetWindowLong().", },