What is CoTaskMemAlloc?
The CoTaskMemAlloc function allocates a block of memory. The CoTaskMemFree function frees a block of memory that was allocated with CoTaskMemAlloc.
When to use CoTaskMemAlloc?
5 Answers. Use CoTaskMemAlloc when returning a char* from a native C++ library to . NET as a string.
What is VirtualAlloc?
VirtualAlloc is a Windows function used for low-level memory allocation. It lets you reserve regions of virtual address space and commit pages within those regions.
What is WriteProcessMemory?
WriteProcessMemory copies the data from the specified buffer in the current process to the address range of the specified process. Any process that has a handle with PROCESS_VM_WRITE and PROCESS_VM_OPERATION access to the process to be written to can call the function.
What is SHGetKnownFolderPath?
An access token that represents a particular user. If this parameter is NULL, which is the most common usage, the function requests the known folder for the current user. This allows clients of SHGetKnownFolderPath to find folder locations (such as the Desktop folder) for the Default User.
What is VirtualAlloc used for?
The VirtualAlloc function can be used to reserve an Address Windowing Extensions (AWE) region of memory within the virtual address space of a specified process. This region of memory can then be used to map physical pages into and out of virtual memory as required by the application.
Does HeapAlloc call VirtualAlloc?
HeapAlloc knows when it needs to call VirtualAlloc and does so for you automatically. Like malloc , but is Windows-only, and provides a couple more options. Suitable for allocating general chunks of memory.
What is Page_execute_readwrite?
An attempt to write to a committed copy-on-write page results in a private copy of the page being made for the process. The private page is marked as PAGE_EXECUTE_READWRITE, and the change is written to the new page.
What is a Lpstr?
LPSTR stands for “long pointer to string”. Back before 32-bit processors, pointers to memory that might be in a different segment of memory (think, a long way away in memory), needed extra space to store. On 32-bit (and later) processors, they’re exactly the same thing. Microsoft uses LPSTR solely for historic reasons.
What is SHGetFolderPath?
The known folder system that underlies SHGetFolderPath allows users or administrators to redirect a known folder to a location that suits their needs. If the folder was redirected, the current value (SHGFP_TYPE_CURRENT) might be “D:\Music”.
Does VirtualAlloc have zero memory?
Memory allocated by this function is automatically initialized to zero. To allocate memory in the address space of another process, use the VirtualAllocEx function.
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