Class wwAPI - West Wind Web Connection

Class wwAPI

The API class provides a number of useful utility functions that access the Windows API or other external DLL interfaces. This class also houses the wwImaging wrapper functions that talk to the wwImaging.dll.

Note that some of the functionality in this class is implemented as plain functions, rather than methods of the class. This is to avoid having to declare a class. None of the wwAPI classes actually contain any sort of state and would be better served as plain functions, but due to legacy codebase requirements they are part of the class.

Tip:
In Web Connection Process methods, wwAPI is always available via Server.oAPI.

Class Members

Member		Description
	ActivateWindow	Activates the Window specified by Window Title or Window Handle. o.ActivateWindow(lvTitle,lnParentHandle)
	aProfileSections	Retrieves all sections of an INI File. o.aProfileSections(@laSections, lcIniFile)
	CharToBin	Converts a binary 4 byte (Double Word) expression into VFP number. CharToBin(lcBinString,llSigned)
	CopyFile	Copies File. Faster than Fox Copy and handles errors internally without throwing a Fox error. o.CopyFile(lcSource, lcTarget,nFlag)
	CopyImage	Allows copying an image from one file format to another. Simply specify the name of the input file and a name of the output file. Based on the extension the new image format is created. Supported formats include gif,jpg,png,tif,bmp. CopyImage(lcSource,lcTarget)
	CreateGUID	Creates either a string or binary GUID value.\ o.CreateGUID(llBinary)
	CreateProcess	CreateProcess(lcExe,lcCommandLine, lnShowWindow,llWaitForCompletion, lnTimeoutMs)
	CreateProcessEx	CreateProcessEx(lcExe, lcCommandLine, lcStartDirectory, lnShowWindow, llWaitForCompletion, lcStdOutputFilename)
	CreateThumbnail	Creates a thumbnail image from a normal sized image by specify source and thumbnail filenames and Width and Height values. CreateThumbnail(lcSourceFile,lcThumbnailFile,lnWidth,lnHeight)
	DecodeDbf	Takes a string encoded with EncodeDbf() and converts it back into a physical file. If the string contains a DBF with a memo the memo is also restored. o.DecodeDbf(lcBuffer, lcDbf)
	EncodeDbf	Takes a single file (DBF or otherwise) or a DBF/MEMO pair and encodes it into a string. String includes a header for verification and information about the file. Use DecodeDbf() to restore the string to a file. o.EncodeDbf(lcDBF, llHasMemo, lcEncodedName)
	EnumKey	Returns a registry value from a key name based on a numeric index. o.EnumKey(tnHKey, tcSubKey, tnIndex)
	FromUtcTime	Returns local time from a UTC time. Optionally lets you provide a timezone offset to account for. If not provided the timezone used is the active timezone of the local machine. o.FromUtcTime(ltTime)
	GetCaptchaImage	Creates a CAPTCHA image with the specified text. CAPTCHA images are meant to use for validation of users on a Web site to protect from spamming. GetCaptchaImage(lcText,lcOutputFile,lcFont,lnFontSize)
	GetClipboardText	Gets special text like RTF or HTML from the clipboard rather than retrieving only text. GetClipboardText(lcFormat)
	GetComputerName	Returns the name of the computer as a string. o.GetComputerName()
	GetDomainFromIp	Retrieves the domain name from a registered IP Address. o.GetDomainFromIp(lcIpAddress)
	GetImageInfo	This function retrieves the height and width and resolution of an image. GetImageInfo(lcImageFile, @lnWidth, @lnHeight, @lnResolution)
	GetIpFromDomain	Retrieves an IP address for a given domain. o.GetIpFromDomain(lcDomain)
	GetLastError	Returns the last Windows API error code. Should be called immediately after an API function if an error occurred to retrieve the error code. o.GetLastError()
	GetMonitorStatus	o.GetMonitorStatistics()
	GetProfileString	Read Profile String information from a given text file using Windows INI formatting conventions o.GetProfileString(pcFileName,pcSection,pcEntry, pnBufferSize)
	GetSpecialFolder	Returns a Windows Special Folder value by either a numeric value or as a special string value. GetSpecialFolder(lnFolder)
	GetSystemDir	Returns the Windows System directory. o.GetSystemDir(llWindowsDir)
	GetSystemErrorMsg	Returns the Message text for a Win32API error code. o.GetSystemErrorMsg(lnErrorNo,lcDLL)
	GetTempPath	Returns the Windows OS temp file path. o.GetTempPath()
	GetTimeZone	Returns the Timezone offset from GMT in minutes. GetTimeZone()
	GetUserName	Returns the currently logged on user. o.GetUserName()
	GetUtcTime	Returns UTC time from a local time. o.GetUtcTime(ltTime)
	GZipCompressString	Compresses a string using the GZip protocol. GZipCompressString(lcString,lnCompressionLevel)
	GZipUncompressString	Uncompresses a GZip encoded string into its original unencoded data. GZipUncompressString(lcCompressed)
	HashMD5	Creates an MD5 Hash from your data. MD5 is a one encryption hash that is frequently used for password authentication and storage of strings. HashMD5(tcData)
	ImpersonateUser	Allows you to switch user context to a different user in your application by specifying username and password. o.ImpersonateUser(lcUsername,lcPassword)
	InstallPrinter	Installs a printer on the system by the printer driver's descriptive name. If the printer driver name is not specified this routine will guess based on the operating system and install a PostScript Printer. o.wwAPI.InstallPrinter(lcDriverName,lcPrinterName)
	InstallPrinterDriver	The function allows installing of a printer driver from the Windows default printer list. InstallPrinterDriver(lcDriverName, lcPrinterName)
	Is64Bit	Determines whether the application is currently running under a 64 bit OS. o.wwAPI.Is64Bit()
	LogonUser	Allows checking whether a username and password are valid with Windows security. o.LogonUser(lcUsername, lcPassword, lcServer)
	MapNetworkDrive	Maps a network drive based on a sharename and username and password. o.MapNetworkDrive(lcDrive,lcSharePath,lcUsername,lcPassword)
	MessageBeep	Sounds the specified System sound. o.MessageBeep(lnSound)
	Ping	Pings a domain and returns whether it's up and running. Optionally returns hop count and time for the ping. o.wwAPI.Ping(lcDomain, @lnHops, @lnTime)
	PlayWave	Plays a WAV file synchronously or asynchronously. o.PlayWave(pcWaveFile,pnPlayType)
	ReadImage	Reads the contents of an area from within an image into a new file. It allows for creating cropped images. Image formats can be read and saved in gif,jpg,png,bmp,tif depending on these extensions. ReadImage(lcSource,lcTarget,lnLeft,lnTop,lnWidth,lnHeight)
	ReadRegistryString	Reads a string or integer value from the registry. o.ReadRegistryString(tnHKey, tcSubkey, tcEntry, tlInteger)
	ResizeImage	Allows resizing of an image to a specified size. This method performs functionality similar to `CreateThumbNail()` which optimizes Thumbnail sizes and compression levels on the fly. This function provides more control and produces higher quality images, but is slower. ResizeImage(lcSource, lcTarget, lnWidth, lnHeight, lnCompression)
	RevertToSelf	This method reverts the impersonated user back to the original user that the application was started under. Useful to rever the user after having called ImpersonateUser. o.RevertToSelf()
	RotateImage	Rotates an image in a file in place updating the original file. RotateImage(lcImage,lnRotateType)
	UnzipFiles	Unzips a Zip file into a directory on disk. This method call talks directly to the DLL bypassing the ActiveX Control. Dependencies: Requires dunzip32.dll in FoxPro or Windows Path UnzipFiles(lcZipFile, lcDestination, lcFileSpec)
	UnzipFolder	Unzips a Zip file into a folder structure. o.UnzipFolder(lcZip, lcFolder)
	WinApi_GetEnvironmentVariable	Returns a Windows Environment Variable. Unlike `GETENV()` it can return strings larger than 255 characters (specifically the Windows path!) `lcPath = WinApi_GetEnvironmentVariable("PATH")` Note: This is a static function not a class method WinApi_GetEnvironmentVariable(lcVar)
	WinApi_GetStartupModuleFilename	Returns a fully qualified path for the executing Windows Process executable. Note this can be either `Vfp9.exe` or your own application like `MyApp.exe`. WinApi_GetStartupModuleFilename()
	WinApi_NullString	Returns a FoxPro string from a null terminated C style string. Terminates the input string at the first CHR(0) found. Note: This is a static function not a method of wwAPI WinApi_NullString(lcString)
	WinApi_SendMessage	Wrapper function around the Windows SendMessage API. Note: This is a static function not a method of wwAPI WinApi_SendMessage(lnHwnd,lnMsg,lnWParam,lnLParam)
	WinApi_Sleep	Puts the current process thread to sleep for the specified number of milliseconds. WinApi_Sleep(lnMilliseconds, llUseDoEvents)
	WriteImage	This function writes an image into an existing image by overlaying it. This allows either merging of two images or if the new image has a tranparent background of overlaying. WriteImage(lcSource,lcInsert,lnLeft,lnTop)
	WriteProfileString	Writes a value into an INI file. o.WriteProfileString(pcFileName,pcSection,pcEntry,pcValue)
	WriteRegistryString	Writes a string value to the registry. o.WriteRegistryString(tnHKey, tcSubkey, tcEntry, tcValue,tlCreate)
	ZipFiles	Zips a set of files based on a filespec into a ZIP file.This method call talks directly to the DLL bypassing the ActiveX Control. Dependencies: dzip32.dll in the FoxPro or Windows path. ZipFiles(lcZipFile, lcFileList, lnCompression, llRecurseDirectories, llAdditive)
	ZipFolder	Zips folder structure into a zip archive. o.ZipFolder(lcZipFile, lcFolder, llFast)

Requirements

Assembly: wwApi.prg