Troubleshoot Win32 VBA System InformationAugust 23, 2020 by Luca Yagan
If your computer has vba win32 system information error, check out these repair ideas.
Also known as Windows API and WinAPI, Win32 is the core set of Microsoft Windows APIs used to develop 32-bit applications. These APIs are responsible for functions in the following categories: Administration and Management — Installing, configuring, and maintaining applications or systems.
Creates a reference to a procedure or function in an external DLL.
The reason for calling the API function is to do something that would otherwise be impossible.
These functions are a collection of functions that Windows programs use to control Windows.
In normal applications, used / called functions were statically linked to the program.
The program contains all the necessary functions.
The obvious problem is that the same functions and procedures are often reproduced.
In 32-bit Office, the pointer must be a 32-bit variable. In 64-bit Office, the pointer must be a 64-bit variable.
When declaring an API, you need to acknowledge this fact by adding the PtrSafe keyword to your API declaration.
If you are using an application programming interface (API) call function, the alias is prefixed with "A"; B. aFindWindow, Windows takes a different approach. Libraries are usually linked dynamically to a program. Shared procedures are located in the dynamic link library and stored in the Windows / System directory when used by multiple programs.
These functions allowThey can create a window, resize it, read and write registry entries, edit a file, etc. Most of these functions are found in three registered link libraries (User32.dll, Kernel.dll and ????)
For a complete list of all Windows API functions and routines with their call syntax, see the "WIN32API.txt" Help file, which can be downloaded from the device's websites.
If you use Windows API calls in your code, you can wrap them in a class.
Before you can use the Windows API function, you must remove the above function in the standard code module above the first procedure.
Declaring a Windows API can be a little tricky for the following reasons:
1) Deciding which API to actually use
2) Deciding which library the function is in
3) Knowing this the exact arguments
This function returns the name of the directory where Windows is installed and takes two arguments:
After the function call, the Windows directory is contained in lpBuffer, and the length of the directory string is contained in nSize. After adding a Declare statement at the top of the module, the function can be accessed by calling the GetWindowsDirectoryA function.
Creating a wrapper can make it easier to actually use the function.
One of the most powerful features of VBA is the ability to invoke DDL through a VBA procedure. A dynamic link library is a list of routines loaded into memory and associated with applications at runtime. DLLs are usually written in C or C ++, although you can create them using Pascal or Delphi. You declare a reference to an external procedure in a DLL using the following syntax.
Since DLL procedures are in files outside of your application, you need to tell VBA where the files are located.
Public Declare Sub name Lib "libname" Alias "aliasname" (arglist)
Public declaration function name Lib "libname" Alias "aliasname" (arglist) as type
Name of the procedure that is immediately after the Declare keyword, specifies the name you want to use to call the procedure (that is, an alias). The quoted name after the Alias keyword indicates the actual name of the procedure as it appears in the DLL.
libname is the name of the DLL that contains the declared procedure,and aliasname is the name of the procedure in the DLL. To use a DLL, you must know the procedure it contains and the arguments for each of those procedures.
A DLL may have a file called "Type Library" that describes the procedures in the DLL. A type library usually has the extension (.OLB) or (.TLB) and is registered with the Windows OLE component. The installer that installs the DLL usually uses the Windows registry to create properties. Tools> Links - displays all available libraries of registered types
If you are using a type library, you do not need to use declaration statements because the functionality is enabled. Type libraries also avoid the hassle of passing strings to DLLs. There is no type library in the Windows API. Hence, you must declare functions before you can use them. The announcement must be made in the declaration section of your module.
It is important to save your work before running any code that calls the DLL as an invalid call. This will crash General Protection (GP) and cause VBA to crash, losing unsaved changes. Also, be careful when returning lines from DLLs
Only numeric arrays can be passed to DLLs. (not string or custom) When passing in an array, you must specify the size of the array.
The name of the procedure specified in the Declare statement is case sensitive. If you want the procedure name to be used in a different case in your code, you must use an alias.
Convert C parameters to VBA declarations. Documentation for DLLs that are not part of the Windows API usually consists of a C header file that contains the type and number of arguments for the DLL functions. Toy needs to convert the C data types to the corresponding VBA data types.
Calling a DLL procedure is a method of performing tasks that standard VBA functions and instructions do not allow. For example, VBA does not have the inherent ability to get information about how much free memory is available, but you can simply do it with an API call. Windows itself contains a number of DLLs with hundreds of useful functions. These functions are collectively referred to as the Windows API.
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