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HOOPS Visualize sandbox works with HOOPS Exchange integration as this page.
https://techsoft3d.atlassian.net/servicedesk/customer/portal/11/article/768049505
When you want to use HOOPS Exchange API directly in sandbox, you will need to load and initialize HOOPS Exchange library as followings.
https://docs.techsoft3d.com/exchange/latest/buildguide/start/initialize_-hoops-exchange.html

Instructions for HPS_MFC_Sandbox

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Open the project properties from Visual Studio

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Navigate to C/C++ → General and add $(HEXCHANGE_INSTALL_DIR)\include in Additional Include Directories
HEXCHANGE_INSTALL_DIR is a environment variable. Its value must be the root of a HOOPS Exchange package.

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Add include and define the macro in CHPSApp.cpp

#define INITIALIZE_A3D_API
#include <A3DSDKIncludes.h>

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Add the following code to CHPSApp::InitInstance() to load and initialize HOOPS Exchange library

A3DBool loaded = A3DSDKLoadLibrary(bin_dir.str().data());
assert(loaded);
A3DLicPutUnifiedLicense(HOOPS_LICENSE);
A3DStatus result = A3DDllInitialize(A3D_DLL_MAJORVERSION, A3D_DLL_MINORVERSION);
assert(result == A3D_SUCCESS);

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Add the following code to CHPSApp::ExitInstance() to terminate and unload the library

#ifdef USING_EXCHANGE
	{
		A3DDllTerminate();
		A3DSDKUnloadLibrary();
	}
#endif

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Add include A3DSDKIncludes.h in CHPSView.cpp

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Add your code to CHPSView::OnUserCode() with HOOPS Exchange API

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For more information check out our forum post.

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