OSName String EndRecordOSName is derived using the following matrix. This structure is mapped into the following Paradox Record Type: Type
GetVersionEx(OSVersionInfo cLong) cLong ĮndUsesOSVersionInfo is a structure returned with the following format:ĬSD Version - String (Service Pack Level) The following Win32 method is available: Uses "kernel32.dll" Some of our approaches require knowing what version of Windows is running.
We will be using Paradox Record Types to map the contents of various Win32 API structures, at times, merging several Win32 structures into one Record Type. This is the basic technique used in this series in passing and retrieving structures when calling Win32 functions. Pascal Hutton pioneered the basic technique for using structures and you are encouraged to review his article at: Many functions use structures which are not directly supported in Paradox®. Many of the Win32 functions referenced for printers are in WINSPOOL.DRV. USER32.DLL - User Interface controls, windows and messaging servicesIn Windows NT/W2K/XP many of the services are implemented in Kernel Mode and managed by various forms of inter-process communication. GDI32.DLL - Graphics Device Interface: drawing and printing The core API divides into three sections: KERNE元2.DLL - All the low level kernel services Most of the functions are implemented in DLLs, to which applications link at run time - either directly or through COM interfaces. It is the combination of data types, definition and functions which C programmers include as a set of header files. The Win32 Application Programming Interface (API) has been used for writing Windows programs since version 1.0. This is the first article in a series that explores the Win32 API and adds additional or enhanced functionality for printers to Paradox applications running on all Win32 platforms (95,98,ME,NT,W2K,XP). There are moments when the ObjectPAL operatives dealing with printers do not provide access to some of the underlying properties of Windows printers or are too slow or unreliable to use in production applications. After downloading into the folder of your choice, make that folder :WORK: and run the included form for a demonstration. Paradox 8 is not supported although Paradox 7-32 surprisingly works. Libraries and forms (Paradox 9) presented are available as a download here. Get Default Printer and Printer Properties Learn how the Win32 API can give you more printing control than ever before!Win32 API and Printers
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