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vfp.fll - Callback for vfp
Gregory Adam
Collection of 4 VFP functions in an FLL: (1) at_bm() - Tuned Boyer-Moore string search (2) AddProperty() - add Property to any object (3) Callback_Set() - returns a function address that can be used for callbacks (4) Callback_Release() - releases a previously allocated function address. Includes Callback_test() - a sample test program. --- VSNET C++ source included
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Il y a 20 années
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vfpcallback.zip
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Description
This is an excerpt of Callback.txt Callback is based on an idea of Christof Lange (wiki) Callback_Set(FunctionName [, argdesc]) Returns a function address. There are currently 4 available that can be active. If no functions available, it will return 0 FunctionName: name of vfp function, eg 'DisplayProgress' argdesc: description of argumentlist currently : i = integer (unsigned, pointer, ...) I = 64 bit integer s = Null terminated string The vfp function will be called with the args described in argdesc If the called function returns an integer it is returned otherwise 0 is returned endif eg: for CopyFileEx fn = CallBack_Set( 'CalledFunction', 'IIIIiiiii') =CopyFileEx(FileNameIn, FileNameOut, fn, 0, 0, 0) =CallBack_Release(fn) << CalledFunction lparameters TotalFileSize, TotalBytesTransferred, ; StreamSize, StreamBytesTransferred, ; StreamNumber, ; CallbackReason, ; SourceFile, ; DestinationFile, ; lpData acti screen ?'FileCopyEx ', StreamBytesTransferred, ' of ', StreamSize return 0 && PROGRESS_CONTINUE >> ================================================================================ CallBack_Release(FunctionAddress) Releases a previously allocated function address with Callback_Set() Returns .T. or .F.
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Gregory Adam

Commentaires
Source code included --- I would like to thank Jim Livermore for both testing the fll and testing the compilation of the sources on another system. Gregory Adam, October 23, 2003

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