Mouse wheel toggle

zsnes/src/gui/gui.asm

@@ -580,7 +580,7 @@ NEWSYM GUIWBAdd,  db 25
 
 NEWSYM BlackAndWhite, db 0
 
-NEWSYM MouseWheel, db 0
+NEWSYM MouseWheel, db 1
 
 GUIsave equ $-GUIRAdd
 

zsnes/src/win/winlink.cpp

@@ -217,6 +217,8 @@ extern "C" void MinimizeWindow()
    IsMinimized = TRUE;
 }
 
+extern "C" BYTE MouseWheel;
+
 BOOL InputRead(void)
 {
    static PrevZ=0;
@@ -245,6 +247,8 @@ aquireagain:;
          MouseMoveX=dims.lX;
          MouseMoveY=dims.lY;
 
+         if (MouseWheel == 1)
+         {
             long zDelta = dims.lZ-PrevZ;
             if (!dims.lZ) zDelta=0;
             while (zDelta>0){
@@ -266,6 +270,7 @@ aquireagain:;
               }
             }
             PrevZ=dims.lZ;
+         }
 
          MouseButton=(dims.rgbButtons[0]>>7)|(dims.rgbButtons[1]>>6)|(dims.rgbButtons[2]>>5)|(dims.rgbButtons[3]>>4);
 		}