Use with Visual Basic

The GflLib use with Visual Basic requires the use of modules. See examples for more informations, or contact us by e-mail.

GflLib.bas

This file contains the API declarations, strcutures and contants required by GflLib and GflLibs.

GflLibExt.bas

This file contains functions required to use GflLib with Visual Basic.

extGetGflBitmapFromPtr	Retrieves the data of a GFL_BITMAP structure from a pointer
extGetGflColorMapFromPtr	Retrieves the data of a GFL_COLORMAP structure from a pointer
extGetGflComments	Retrieves a dynamic array of string (comments) from a pointer
extGetStr	Retrieves a string from a pointer
extRTN	Trims and erases the NULL characters of a C string
extFarProc	Gets the pointer on a Visual Basic function with AddressOf
extShowBitmapOnDc	Display a GFL_BITMAP in a graphical context.

GflLibe.bas

This file contains the API declarations, strcutures and contants required by GflLibe, extension of GflLib.

GflLibeExt.bas

This file contains functions required to use GflLibe with Visual Basic.

extGetDIBFromPtr	Retrieve a DIB from a pointer
extShowBitmapOnDcEx	Display a GFL_BITMAP in a graphical context by using the ConvertBitmapIntoDIB function (GflLibe) (same as extShowBitmapIntoDC).
extShowTransparencyBitmapOnDCEx	Display a transparency GFL_BITMAP in a graphical context by using the ConvertBitmapIntoDIB function (GflLibe).

GflReadData.bas

This file contains functions required to use callbacks in LoadBitmapFromHandle and LoadPreviewFromHandle with Visual Basic.

extLoadFile	Loads a file into a READ_DATA.
extSetDataToPtr	Copy the data of a READ_DATA structure in memory.
READ_ReadFunction	The function which reads the data.
READ_TellFunction	The function which gives the position of reading.
READ_SeekFunction	The function which sets the position.

GflSaveData.bas

This file contains functions required to use callbacks in SaveBitmapIntoHandle with Visual Basic.

extSaveFile	Saves the data from a pointer on a SAVE_DATA structure in a file.
extWriteArray	Saves the data from a pointer in a array.
extGetDataToPtr	Copy in a SAVE_DATA structure the data in memory.
SAVE_ReadFunction	The function which writes the data.
SAVE_TellFunction	The function which gives the position of writing.
SAVE_SeekFunction	The function which sets the position.