Normally, data is imported to QuickBooks with Excel or csv file through the Import Data process. We are looking for a way to import Customer, Vendor and Accounting data into QuickBooks Online using existing DLLs in QuickBooks API, with VB.NET.
So my questions are: Do such DLLs that enable the import of this data exist in the QuickBooks API? If so, where are they located? And does any reference documentation for importing data with VB.NET exist? Since I personally do not have access to QuickBooks (our client does), I would have to use the QuickBooks Sandbox for development, correct? As you may have noticed, this QuickBooks API is new to me.
My searches for information about importing data into QuickBooks has generally returned information about the usual Import Data process with data in Excel spreadsheets. I have looked through QuickBooks API and SDK documentation, but could not find VB.NET methods or programs for importing data. Stack Overflow shows questions regarding Python, PHP, C# and Java for importing data, but I really need to see examples or at least instructions for programming the QuickBooks API with VB.NET.