GFL_LoadParams	GFL_LoadParams PROTO __lpGflParams:LPGFL_LOAD_PARAMS Initialize the GFL_LOAD_PARAMS before loading an image.
GFL_QuickLoadImageFile	GFL_QuickLoadImageFile PROTO __lpszFileName:LPSTR Load an image file into memory. If the function ends successfully, it returns an HBITMAP on the newly loaded image, otherwise it returns NULL.
GFL_CanILoadThisFile	GFL_CanILoadThisFile PROTO __lpszFileName:LPSTR Asks GFL if the file can be loaded If the function ends successfully it return TRUE into the EAX register otherwise it returns FALSE.
GFL_LoadThumbnailFromFile	GFL_LoadThumbnailFromFile PROTO __lpszFileName:LPSTR,__dwExpectedWidth:DWord,__dwExpectedHeight:DWord Loads a thumbnail from the specified image file and resizes it to the expected width and height.
GFL_QuickLoad	GFL_QuickLoad PROTO __lpszFileName:LPSTR,__dwNewWidth:DWord,__dwNewHeight:DWord,__dwAngle:DWord Loads the image file and resizes it. It returns a pointer to a GFL_BITMAP structure. If the function fails it returns FALSE.
GFL_LoadImageFromFile	GFL_LoadImageFromFile PROTO __lpszFileName:LPSTR This is the main function. It loads a image file and fills an IMAGE_INFOS structure. If the function fails it returns NULL.
GFL_ResizeImageFromFile	GFL_ResizeImageFromFile PROTO __lpszFileName:LPSTR,__dwNewWidth:DWord,__dwNewHeight:DWord Loads an image file, resizes the image and fills an IMAGE_INFOS structure.
GFL_ReDimImageFromFile	GFL_ReDimImageFromFile PROTO __lpszFileName:LPSTR,__dwNewWidth:DWord,__dwNewHeight:DWord Loads an image file, resizes the image and fills an IMAGE_INFOS structure.
GFL_ResizeAndRotateFromFile	GFL_ResizeAndRotateFromFile PROTO __lpszFileName:LPSTR,__dwNewWidth:DWord,__dwNewHeight:DWord,__dwAngle:DWord Loads an image file, resizes and rotaes the image and fills an IMAGE_INFOS structure.
GFL_GetBitmapHandleFromBits	GFL_GetBitmapHandleFromBits PROTO __lpImage:Ptr IMAGE_INFOS Gets the bitmap handle from the images bits given in the __lpImage parameter.
GFL_QuickResize	GFL_QuickResize PROTO __lpszFileName:LPSTR,__dwNewWidth:DWord,__dwNewHeight:DWord Resizes an image and returns a HBITMAP
GFL_Clipboard_Copy	GFL_Clipboard_Copy PROTO __lpszFileName:LPSTR Copies an image file into the clipboard.
GFL_SetAsWallPaper	GFL_SetAsWallPaper PROTO __lpImage:Ptr IMAGE_INFOS,__lpszImageFileName:LPSTR Sets the specified file name as wallpaper.
GFL_ImageToClipboard	GFL_ImageToClipboard PROTO __hWnd:HWND,__lpImage:Ptr IMAGE_INFOS Copies an IMAGE_INFOS structure into the clipboard.
GFL_Rotate	GFL_Rotate PROTO __lpszFileName:LPSTR,__dwAngle:DWord Rotates an image file.
GFL_AutomaticLevel	GFL_AutomaticLevel PROTO __lpszFileName:LPSTR Adjusts the image levels.
GFL_Swap_GBR	GFL_Swap_GBR PROTO __lpszFileName:LPSTR Transform from RGB to GBR
GFL_Swap_GRB	GFL_Swap_GBR PROTO __lpszFileName:LPSTR Transform from RGB to GRB
GFL_Swap_BRG	GFL_Swap_BRG PROTO __lpszFileName:LPSTR Transform from RGB to BRG
GFL_Swap_BGR	GFL_Swap_BGR PROTO __lpszFileName:LPSTR Transform from RGB to BGR
GFL_Swap_RBG	GFL_Swap_RBG PROTO __lpszFileName:LPSTR Transform from RGB to RBG
	GFL FILTERS
GFL_AutomaticContrast
GFL_Negative
GFL_Sepia
GFL_LogarithmicCorrection
GFL_Normalize
GFL_FlipHorizontal
GFL_FlipVertical
GFL_Equalize
GFL_EqualizeLuminance
	NON GFL FUNCTIONS
GFL_MiroirVertical
GFL_MiroirHorizontal
	USEFUL FUNCTIONS
GFL_CreateBitmapFromFile
GFL_GetBitsFromHandle

Download the library here