====== zproj_DemandSave ======

===== Description =====

Display a message box notifying the user that the project must be saved to continue, and provide a 'save as' window to save the project.

===== Files =====

^ Declaration | ''zProj.h'' |
^ Implementation | ''zProj.cpp'' |

===== Function prototype =====

<code="C++">
bool zproj_DemandSave();
</code>

===== Return value =====

True if the project is successfully saved, and false if:
  * The user cancelled the save window, or;
  * An unspecified error occurred.

===== Comments =====

The notification message box looks like:

{{ :zeolite:functions:zproj_demandsave:demandsave.png |}}

If the user clicks //OK//, a standard Windows file dialog is displayed to allow the user to select the filename of the project. If the user clicks //Cancel//, ''zproj_DemandSave'' returns false.