Windows Phone 8.1的PreProcessor常数

Question

I have received a project from a partner and I tried to compile and deploy it in my device. However the build fails because a const value seems undefined.

#if !defined(MXD_OS_WINDOWS_PHONE)
    uResult = WaitForMultipleObjects(uCount, ahWatch, FALSE, INFINITE);
#else
  uResult = WaitForMultipleObjectsEx(uCount, ahWatch, false, INFINITE, true);
#endif

When I search my workspace I can find a value that the MXD_OS_WINDOWS_PHONE is being defined. For example there is no line

#define MXD_OS_WINDOWS_PHONE 1

Is there any way to define the value in a project file? Is this mandatory the value to be defined?

Answer 1

try to open the project settings -> compile tab -> conditional symbol

(sorry for Visual Studio in Italian)