unmanaged-memory

I'm quite confused about how to pass handle to my managed object from .Net to unmanaged code. Now I'm developing kind of "driver" for Oracle Siebel CRM using C#. And how i faced with problem about how to pass handle to Driver API have such method: ISCAPI ISC_RESULT CreateISCDriverInstance /* in */(const ISC_STRING mediaTypeStr, /* in */ const ISC_STRING languageCode, /* in */ const ISC_STRING connectString, /* in */ const struct ISC_KVParamList* datasetParams, /* out */ ISC_DRIVER_HANDLE* handle); And i have the problem with last parameter ISC_DRIVER_HANDLE* handle. I want to say that it may

Is there a way to marshal a structure (possibly stored in a TypedReference ) to unmanaged memory without actually boxing it? The type of the structure isn't known at runtime, so I can't use the generic overload of StructureToPtr (.NET 4.5.1). I can get a MethodInfo of the StructureToPtr overload, but there doesn't seem to be a way to invoke it passing a generic reference or a TypedReference . Edit: The generic StructureToPtr still boxes the structure, so trying to invoke it is useless. I've finally found the answer, the SafeBuffer class. It contains exactly what I wanted - structure with

Is that ok to Write and Read directly from a unlocked Bitmap unmanaged memory? Can I keep using the BitmapData after I UnlockBits of the Bitmap? I did a test app where I can read the pixel of the Bitmap of a PictureBox at mouse position while another thread is writing pixels to the same Bitmap. EDIT 1: As Boing have pointed out in his answer: "Scan0 does not point to the actual pixel data of the Bitmap object; rather, it points to a temporary buffer that represents a portion of the pixel data in the Bitmap object." from MSDN . But once I get the Scan0, I'm able to read/write to the Bitmap