Undocumented API to convert image file format between GIF/BMP/JPG/PNG.

[Patrice Terrier]

Convert image file format between GIF/BMP/JPG/PNG.

Wrapper for the undocumented SHConvertGraphicsFile function found in shlwapi.dll version >= 6.00

Source code is in the attached ZIP file.

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[Patrice Terrier]

For your information, i have written gConvert to create full 32-bit ARGB bitmap (from transparent PNG file), that will be used with the next WinLIFT WSA API skAlphablend.

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[José Roca]

 
I suggest to change the name of the TrueOrFalse parameter to something more explanatory, such bOverwrite.

[Patrice Terrier]

Yes, the last parameter is a boolean flag, %TRUE means OverWrite destination.

Indeed I am always using it in OverWrite mode myself.

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[José Roca]

 
I have read that it doesn't work with Windows 7. Is that true?

[Pierre Bellisle]

I did some test,

with GetProcAddress
- Vista   32: Conversion OK
- Seven 32: No adress returned
- Seven 64: No address returned

With GetProcAddressDirectly by Semen
- Vista  32: Conversion OK
- Seven32: GPF
- Seven64: GPF

Maybe some update to Seven made it unusable.

Patrice, is it still working on your Seven ?

[Patrice Terrier]

I just checked with the current version of Seven, and you and José are correct, it doesn't work anymore with it

That's the problem with undocumented API, it could be changed at any time without prior notification.

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[Pierre Bellisle]

Well, we still have GDI+.

Speaking of...
I just downloaded José's help file.

One word José...

Thank you, thank you, thank you.