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ExtractIconEx() returns the number of successfully extracted icons from a file. The routine may return 0 in case no icons could be extracted but it could also return 0 if the file is not a valid PE image file or the file couldn't be found. PrivateExtractIcons and the internal USER32 routine, ICO_ExtractIconExW(), return -1 in such scenarios. The behaviour is correct however we do not want that ExtractIconEx() returns -1 as well as it doesn't comply with the general documentation. In such cases, simply return 0 as no successful icons have been extracted due to related file failures. CORE-16535
====================
ReactOS Tests
====================
This directory contains various tests for ReactOS.
Make sure you also have a copy of the rest of the ReactOS
source before you attempt to build anything in this module.
It is to be placed under "modules" subdirectory of a trunk checkout.
The module requires to be enabled during the "configure" process.
To include the module in your build folder, run the configure script with the flags -DENABLE_ROSTESTS=1
# For Windows users
configure.cmd -DENABLE_ROSTESTS=1
# For UNIX users
./configure.sh -DENABLE_ROSTESTS=1