What does __ Stdcall mean?
__stdcall is the calling convention used for the function. This tells the compiler the rules that apply for setting up the stack, pushing arguments and getting a return value. __stdcall is the standard calling convention for Win32 system calls.
What is OpenMutex?
The OpenMutex function enables multiple processes to open handles of the same mutex object. Use the CloseHandle function to close the handle. The system closes the handle automatically when the process terminates. The mutex object is destroyed when its last handle has been closed.
Where is Winapi defined?
It is defined in Windows header files as WINAPI, which is in turn defined using the Win32 declarator __stdcall.
What is _stdcall in C?
Description. The _stdcall and __stdcall keywords force the compiler to generate function calls using the Standard calling convention. Functions must pass the correct number and type of arguments; this is unlike normal C use, which permits a variable number of function arguments.
What is a mutex object?
A mutex object is a synchronization object whose state is set to signaled when it is not owned by any thread, and nonsignaled when it is owned. Only one thread at a time can own a mutex object, whose name comes from the fact that it is useful in coordinating mutually exclusive access to a shared resource.
What is __ Thiscall?
The Microsoft-specific __thiscall calling convention is used on C++ class member functions on the x86 architecture. It’s the default calling convention used by member functions that don’t use variable arguments ( vararg functions). That’s because they use a register-based calling convention by default.
What is a handle in Win32 programming?
It provides an opaque wall between the user code and the Win32 library’s internal representations that increases portability, between versions of Windows, of code that uses the Win32 API. Show activity on this post. A HANDLE in Win32 programming is a token that represents a resource that is managed by the Windows kernel.
What is a handle in C++?
The HANDLE itself is just an integral type. Usually, but not necessarily, it is a pointer to some underlying type or memory location. For example, the HANDLE returned by GetModuleHandle is actually a pointer to the base virtual memory address of the module.
How to get the handle of a window in Windows?
Think of the window in Windows as being a struct that describes it. This struct is an internal part of Windows and you don’t need to know the details of it. Instead, Windows provides a typedef for pointer to struct for that struct. That’s the “handle” by which you can get hold on the window., Thanks for contributing an answer to Stack Overflow!
What is an object handle in system resources?
Instead, your application must obtain an object handle, which it can use to examine or modify the system resource. Each handle has an entry in an internally maintained table. Those entries contain the addresses of the resources, and the means to identify the resource type.