Returns the visibility of application.
    GSErrCode ACAPI_Environment (
        APIEnv_GetShowHideStateID,
        bool*     isShown
    );
    
Parameters
- isShown
- [out] Application is visible.
Return Values
- NoError
- The function has completed with success.
Remarks
This function is used to used to get visibility of application.
The actual visibility can be changed with the APIEnv_ChangeShowHideStateID function.
Supported on Windows only.
Requirements
- Version: API 2.1 or later
- Header: APIdefs_Environment.h