WebFor example, (vt == VT_ARRAY VT_BSTR) means that you are passing a safearray of bstr. Similarly, if vt equals VT_BYREF (something), it means that you are passing (something) by reference. In this case, you are explicitly passing a type-safe pointer, where (something) indicates the type pointed to. WebMarshal a SAFEARRAY for ADO.NET Demonstrates how to add a native SAFEARRAY to a database and how to marshal a managed array from a database to a native SAFEARRAY. Example In this example, the class DatabaseClass is created to interact with an ADO.NET xref:System.Data.DataTable object.
Using a Multidimensional SAFEARRAY to pass data across from
WebThus, it is important to properly declare the destination COM parameter as a SAFEARRAY(), when implementing in C++. For example, if the desire is to pass an IDL array of 32-bit integer values to a COM. client, the COM method parameter needs to be declared like this: [in, out] SAFEARRAY(long) psa. For the code example above, the full ... WebMar 19, 2024 · enum class ItemType { ARRAY, PRIMITIVE }; SAFEARRAY* StoreSafeArray (const std::vector &values, VARENUM type) { // allocate the safe array itself auto sa = SafeArrayCreateVector ( (VARTYPE)type, 0, values.size ()); if (sa == nullptr) { // error handling } _variant_t* ptr; if (FAILED (SafeArrayAccessData (sa, (void**)&ptr))) { // error handling } … cruise and land vacations greek isles
SafeArrayPutElement function (oleauto.h) - Win32 apps
WebNov 7, 2011 · You obtain each element of the SAFEARRAY using the SafeArrayGetElement () API. 2.6 Here is a sample C++ client code that calls ITestInterface::GetTestStructArray () : #import "..\TestCSCOMServer01\bin\Debug\TestCSCOMServer01.tlb" raw_interface_only no_implementation using namespace TestCSCOMServer01; WebApr 12, 2010 · Call VariantClear () or SafeArrayDestroy (). But do not call both. Example 1 VARIANT vtProp; SAFEARRAY* pSafeArrayOfInt = NULL; VariantInit (&vtProp); ... // Get value for vtProp via some COM method... ... if (V_VT (&vtProp) == (VT_ARRAY VT_I4)) { pSafeArrayOfInt = V_ARRAY (&vtProp); } ... VariantClear (vtProp); Example 2 VARIANT … WebApr 18, 1996 · For example: #define ArrayLong SAFEARRAY(long) * OLETYPE.ODL should be included in any type libraries that require SafeArrays. It includes WINTYPE.ODL, so you … cruise and maritime offers