diff --git a/dlls/user.exe16/dialog.c b/dlls/user.exe16/dialog.c
index 469a06fa739..04f2435e840 100644
--- a/dlls/user.exe16/dialog.c
+++ b/dlls/user.exe16/dialog.c
@@ -541,7 +541,7 @@ HWND16 WINAPI GetDlgItem16( HWND16 hwndDlg, INT16 id )
  */
 void WINAPI SetDlgItemText16( HWND16 hwnd, INT16 id, SEGPTR lpString )
 {
-    SendDlgItemMessage16( hwnd, id, WM_SETTEXT, 0, (LPARAM)lpString );
+    SendDlgItemMessage16( hwnd, id, WM_SETTEXT, 0, lpString );
 }
 
 
@@ -550,7 +550,7 @@ void WINAPI SetDlgItemText16( HWND16 hwnd, INT16 id, SEGPTR lpString )
  */
 INT16 WINAPI GetDlgItemText16( HWND16 hwnd, INT16 id, SEGPTR str, UINT16 len )
 {
-    return (INT16)SendDlgItemMessage16( hwnd, id, WM_GETTEXT, len, (LPARAM)str );
+    return SendDlgItemMessage16( hwnd, id, WM_GETTEXT, len, str );
 }
 
 
diff --git a/dlls/user.exe16/message.c b/dlls/user.exe16/message.c
index 7dccc5f5aec..011e5c4baf2 100644
--- a/dlls/user.exe16/message.c
+++ b/dlls/user.exe16/message.c
@@ -2287,7 +2287,7 @@ static LRESULT edit_proc16( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, B
                                            (INT)(SHORT)LOWORD(lParam), FALSE );
         break;
     case EM_LINEINDEX16:
-        if ((INT16)wParam == -1) wParam = (WPARAM)-1;
+        if ((INT16)wParam == -1) wParam = -1;
         result = wow_handlers32.edit_proc( hwnd, msg - msg16_offset, wParam, lParam, FALSE );
         break;
     case EM_SETSEL16:
diff --git a/dlls/user.exe16/user.c b/dlls/user.exe16/user.c
index 7521c54c178..0b321b7d6e4 100644
--- a/dlls/user.exe16/user.c
+++ b/dlls/user.exe16/user.c
@@ -2743,22 +2743,21 @@ DWORD WINAPI DragObject16( HWND16 hwndScope, HWND16 hWnd, UINT16 wObj,
 	    SetCursor(hCurrentCursor);
 
 	/* send WM_DRAGLOOP */
-	SendMessage16( hWnd, WM_DRAGLOOP, (WPARAM16)(hCurrentCursor != hBummer),
-	                                  (LPARAM) spDragInfo );
+        SendMessage16( hWnd, WM_DRAGLOOP, hCurrentCursor != hBummer, spDragInfo );
 	/* send WM_DRAGSELECT or WM_DRAGMOVE */
 	if( hCurrentWnd != lpDragInfo->hScope )
 	{
 	    if( hCurrentWnd )
 	        SendMessage16( hCurrentWnd, WM_DRAGSELECT, 0,
-		       (LPARAM)MAKELONG(LOWORD(spDragInfo)+sizeof(DRAGINFO16),
-				        HIWORD(spDragInfo)) );
+                        MAKELPARAM(LOWORD(spDragInfo)+sizeof(DRAGINFO16),
+                                   HIWORD(spDragInfo)) );
 	    hCurrentWnd = lpDragInfo->hScope;
 	    if( hCurrentWnd )
-                SendMessage16( hCurrentWnd, WM_DRAGSELECT, 1, (LPARAM)spDragInfo);
+                SendMessage16( hCurrentWnd, WM_DRAGSELECT, 1, spDragInfo);
 	}
 	else
 	    if( hCurrentWnd )
-	        SendMessage16( hCurrentWnd, WM_DRAGMOVE, 0, (LPARAM)spDragInfo);
+                SendMessage16( hCurrentWnd, WM_DRAGMOVE, 0, spDragInfo);
 
     } while( msg.message != WM_LBUTTONUP && msg.message != WM_NCLBUTTONUP );
 
@@ -2769,7 +2768,7 @@ DWORD WINAPI DragObject16( HWND16 hwndScope, HWND16 hWnd, UINT16 wObj,
 
     if( hCurrentCursor != hBummer )
 	msg.lParam = SendMessage16( lpDragInfo->hScope, WM_DROPOBJECT,
-				   (WPARAM16)hWnd, (LPARAM)spDragInfo );
+                                    hWnd, spDragInfo );
     else
         msg.lParam = 0;
     GlobalFree16(hDragInfo);
diff --git a/dlls/user.exe16/window.c b/dlls/user.exe16/window.c
index 244924ffd0b..0bd4518dcc1 100644
--- a/dlls/user.exe16/window.c
+++ b/dlls/user.exe16/window.c
@@ -347,7 +347,7 @@ INT16 WINAPI GetWindowText16( HWND16 hwnd, SEGPTR lpString, INT16 nMaxCount )
  */
 BOOL16 WINAPI SetWindowText16( HWND16 hwnd, SEGPTR lpString )
 {
-    return SendMessage16( hwnd, WM_SETTEXT, 0, (LPARAM)lpString );
+    return SendMessage16( hwnd, WM_SETTEXT, 0, lpString );
 }
 
 
@@ -1475,9 +1475,9 @@ void WINAPI PaintRect16( HWND16 hwndParent, HWND16 hwnd, HDC16 hdc,
         HWND parent = WIN_Handle32(hwndParent), hwnd32 = WIN_Handle32(hwnd);
 
         if (!parent) return;
-        hbrush = SendMessageW( parent, WM_CTLCOLORMSGBOX + hbrush, (WPARAM)hdc, (LPARAM)hwnd32 );
+        hbrush = SendMessageW( parent, WM_CTLCOLORMSGBOX + hbrush, hdc, (LPARAM)hwnd32 );
         if (!hbrush) hbrush = DefWindowProcW( parent, WM_CTLCOLORMSGBOX + hbrush,
-                                              (WPARAM)hdc, (LPARAM)hwnd32 );
+                                              hdc, (LPARAM)hwnd32 );
     }
     if (hbrush) FillRect16( hdc, rect, hbrush );
 }
@@ -1493,9 +1493,9 @@ HBRUSH16 WINAPI GetControlBrush16( HWND16 hwnd, HDC16 hdc, UINT16 ctlType )
     HWND parent = GetParent( hwnd32 );
 
     if (!parent) parent = hwnd32;
-    ret = SendMessageW( parent, WM_CTLCOLORMSGBOX + ctlType, (WPARAM)hdc, (LPARAM)hwnd32 );
+    ret = SendMessageW( parent, WM_CTLCOLORMSGBOX + ctlType, hdc, (LPARAM)hwnd32 );
     if (!ret) ret = DefWindowProcW( parent, WM_CTLCOLORMSGBOX + ctlType,
-                                    (WPARAM)hdc, (LPARAM)hwnd32 );
+                                    hdc, (LPARAM)hwnd32 );
     return ret;
 }