API Generator for Visual Basic
The API Generator is an advanced API Viewer that enables you to create prototypes for any VB API calls. If you have used the Microsoft API Viewer in VB6, and you are starting to work with VB7, the API Generator will help you to apply all your knowledge of Win API in the new environment. ... I suppose, that you remember the manual extracting of the arguments and return values of the Win API functions by Microsoft API Viewer. ... Just run the API Generator, that generates all these dependencies automatically.
http://www.chat.ru/~winrazor/apigen.zip - 402Kb - Download - Screenshot

Hook API SDK
Hook API SDK is a Software Development Kit for easy and quickly develop Windows System Wide API Hooking program. It helps you hooking Windows system functions or functions in 3rd applications, this means you can call your own functions instead of some Windows system APIs or functions of other...
http://www.hook-api.com/hooking-api.zip - 259Kb - Download - Screenshot

API Monitor
API Monitor is a software that allows you to spy and display Win32 API calls made by applications. It can trace any exported APIs and display wide range of information, including function name, call sequence, input and output parameters, function return value and more. ... A useful developer tool for seeing how win32 applications work and learn their tricks.
http://www.apimonitor.com/download/APIMonitorTrial.exe - 4Mb - Download - Screenshot

Auto Debug Professional
An auto-tracing tool of software. Functions Profession version offer a debug agent mode which allow you to debug your application anywhere. Use this mode, you can debug your application at your customer PC with RELEASE version. Recording input parameters and output result of the functions which... Plug-in technology is used to achieve the function of customizing monitoring result function. ... Supporting spying the parameters of function before and after the function is called. ... Displaying the tracing result with tree structure, which can get the nested relationship of function call.
http://www.autodebug.com/download/debugpro.zip - 0b - Download - Screenshot

Auto Debug for Windows
An auto-tracing tool of software. User can set breakpoints, this application will auto trace the target program and record the input and output of function call. Therefore, the software can help programmer analyse errors, process inside the target program, especially help the programmer analyse... Plug-in technology is used to achieve the function of customizing monitoring result function. ... Supporting spying the parameters of function before and after the function is called. ... The user can define input format and output format and the number of parameters of every function.
http://www.autodebug.com/download/debugapispy.zip - 0b - Download - Screenshot

Subclassing ActiveX
The control element accomplishes a subclassing for a window stated by its handle. The window function is the function of a window, which completely determines the behavior of the window (and thus the reaction of the window to user inputs). This window function is replaced by another function by... This function then can be freely defined in the Message event of the Subclassing control element (MS Windows API programming). ... It is possible to either replace (StopMessage = True) or only to supplement the original window function (StopMessage = False).
http://www.sensalgo.com/downloads/saoeasax.zip - 2Mb - Download - Screenshot

vstr
Vstr is a safe and fast string library for C. It is designed for network communication. Its design uses blocks of ptr+length data, so adding, substituting, and deleting data are all fast operations. This model also allows it to do automatic referencing for mmap() areas of memory. ... The total API is over 270 functions, but laid out in a easy to remember manner, including data parsing functions, a non-destructive split() function, and conversion functions (among others). ... Another big feature of the library is a POSIX and ISO 9899:1999 compliant printf() like function, which can also be...
http://www.and.org/vstr/1.0.14/vstr-1.0.14.tar.gz - 1Mb - Download

Serial Port Control
Software developers can access various devices by utilizing the Windows API. When using an API, you gain access to a full spectrum of available features, but API programming is a very tough and time-consuming task. You have to study the documentation and you have to create all the... Instead of spending weeks or even months for API coding, you could use a ready-made ActiveX component in your program. ... Simply define a function in your program that will be triggered automatically by the appropriate event and process the data.
http://www.serial-port-control.com/serial-port-control.zip - 561Kb - Download - Screenshot

xFunction for Linux
The xFunction library is the universal solution for integration of Java code with code written in other languages, superior in many aspects to Java Native Interface (JNI). With xFunction, you no longer need to implement those ugly native methods. Instead, you extend and instantiate xFunction... Using xFunction, you may invoke any operating system API call or function from any DLL or shared library in a natural and convenient manner. ... All necessary data conversions and external function calls are done seamlessly by the xFunction library.
http://www.excelsior-usa.com/download/xfunction-latest-eval-linux.zip - 101Kb - Download

xFunction for Mac OS X
The xFunction library is the universal solution for integration of Java code with code written in other languages, superior in many aspects to Java Native Interface (JNI). With xFunction, you no longer need to implement those ugly native methods. Instead, you extend and instantiate xFunction... Using xFunction, you may invoke any operating system API call or function from any dynamic library in a natural and convenient manner. ... All necessary data conversions and external function calls are done seamlessly by the xFunction library.
http://www.excelsior-usa.com/download/xfunction-latest-eval-macosx.zip - 101Kb - Download