Include api folder, cpprestsdk folder, leanplumsdk folder and jsoncpp folder.

Project > Add > Existing item...

• In C/C++ > General page, add api, cpprestsdk, and leanplumsdk path into "Additional Include Directories".

• In C/C++ > Code Generation page, choose "Multi-threaded Debug (/MTd)" runtime library.

Leanplum SDK uses C++ REST SDK to connect to Leanplum servers, you need to add the settings like below to turn off exporting functions from the C++ Rest SDK dll, which is why it is applicable for static linking:

• In C/C++ > Preprocessor page, add _NO_ASYNCRTIMP into "Preprocessor Definitions".

• In Linker > Input page, add cpprest110_2_0.lib and winhttp.lib into "Additional Dependencies".

Add the statements into your code: #include "InterfaceObserver.h" #include "Leanplum.h"

The SDK uses observer pattern to implement callback mechanism so your class needs to inherit InterfaceObserver class and implement the Notify() function.

void DemoDlg::Notify(MessageCode::MESSAGE_CODE messageCode, WPARAM wParam, LPARAM lParam)
{
	if (MessageCode::MESSAGE_START_FINISH == messageCode) {
		// do something after start a session
	} else if (MessageCode::MESSAGE_GETVARS_FINISH == messageCode) {
		// do something after get variables
	} ...
}

Leanplum leanplum;
// register as an observer
leanplum.AttachObserver(this);

Define your API keys at the beginning.

leanplum.SetAppId(_T("app_..."));
leanplum.SetProductionKey(_T("prod_..."));
leanplum.SetDevelopmentKey(_T("dev_..."));
leanplum.SetDataExportKey(_T("exp_..."));
leanplum.SetContentReadonlyKey(_T("cro_..."));

To find yours, select your app in the leanplum dashboard, and click Apps. Under Keys & Settings, click Show.

Use DefineVariable(CString name, std::pair<VARIABLE_TYPE, CString> value) function to declare variables. After definition, call FinishVariablesDefinition() to finish.

// define variables
leanplum.DefineVariable(_T("Message"), std::make_pair(Leanplum::VARIABLE_TYPE::STRING, _T("Message content.")));
leanplum.DefineVariable(_T("Number"), std::make_pair(Leanplum::VARIABLE_TYPE::INT, _T("1")));
leanplum.FinishVariablesDefinition();

You need reset the leanplum object and set the current user ID and device ID.

// do these before start a session
// reset and initial leanplum object
leanplum.ResetApisData();
// set user info
leanplum.SetUserId(userid);
leanplum.SetDeviceId(deviceid);
// start a session
leanplum.Start();

• Call Start() to start a session.
• Call SyncVariables() to sync variables with server as many times as you want.
• Call GetValuebyId() to get the variables after syncing with server.
• Remember to call Stop() in the end.

Make sure you're enterprise customer because the REST API is only for enterprise customers.