dinput: Implement DIPROP_PRODUCTNAME in GetProperty.

dlls/dinput/joystick.c

@@ -583,6 +583,7 @@ HRESULT WINAPI JoystickWGenericImpl_GetProperty(LPDIRECTINPUTDEVICE8W iface, REF
             }
             break;
         }
+        case (DWORD_PTR) DIPROP_PRODUCTNAME:
         case (DWORD_PTR) DIPROP_INSTANCENAME: {
             DIPROPSTRING *ps = (DIPROPSTRING*) pdiph;
             DIDEVICEINSTANCEW didev;
@@ -590,7 +591,10 @@ HRESULT WINAPI JoystickWGenericImpl_GetProperty(LPDIRECTINPUTDEVICE8W iface, REF
             didev.dwSize = sizeof(didev);
 
             IDirectInputDevice_GetDeviceInfo(iface, &didev);
-            lstrcpynW(ps->wsz, didev.tszInstanceName, MAX_PATH);
+            if (LOWORD(rguid) == (DWORD_PTR) DIPROP_PRODUCTNAME)
+                lstrcpynW(ps->wsz, didev.tszProductName, MAX_PATH);
+            else
+                lstrcpynW(ps->wsz, didev.tszInstanceName, MAX_PATH);
 
             return DI_OK;
         }

dlls/dinput/tests/joystick.c

@@ -253,6 +253,14 @@ static BOOL CALLBACK EnumJoysticks(const DIDEVICEINSTANCEA *lpddi, void *pvRef)
     ok(!lstrcmpW(nameBuffer, dps.wsz), "DIPROP_INSTANCENAME returned is wrong. Expected: %s Got: %s\n",
                  wine_dbgstr_w(nameBuffer), wine_dbgstr_w(dps.wsz));
 
+    hr = IDirectInputDevice_GetProperty(pJoystick, DIPROP_PRODUCTNAME, &dps.diph);
+    ok(SUCCEEDED(hr), "IDirectInput_GetProperty() for DIPROP_PRODUCTNAME failed: %08x\n", hr);
+
+    /* Test if product name is the same as present in DIDEVICEINSTANCE */
+    MultiByteToWideChar(CP_ACP, 0, lpddi->tszProductName, -1, nameBuffer, MAX_PATH);
+    ok(!lstrcmpW(nameBuffer, dps.wsz), "DIPROP_PRODUCTNAME returned is wrong. Expected: %s Got: %s\n",
+                 wine_dbgstr_w(nameBuffer), wine_dbgstr_w(dps.wsz));
+
     /* Test for GUIDPATH properties */
     memset(&dpg, 0, sizeof(dpg));
     dpg.diph.dwSize = sizeof(DIPROPGUIDANDPATH);