Download libPNG1.dll DLL file from a collection of libraries and elements onto OCX. Perhaps this file can help you correct the error "library not found libPNG1.dll" which appears as a result of malfunctioning of the Windows operating system or the program.
How to download free libpng1.dll?
Also, this file may be required for software development. When using libPNG1.dll file you should read the copyright to it.