This patch fixes a test failure if a user has a non-standard icon size 
set. Windows 7, for instance, offers more variation than previous 
versions of Windows in icon scaling. We should get the system icon 
metric and compare our icon size against that.

The test passes on windows using AMD and Nvidia but not on AMD on
linux. A close look at the spec shows that behavior of a version lower
than 3.0 is up to the driver.

opengl32: No display driver supports windowless opengl3 rendering and likely no driver will ever will.

ntdll: Define a generic file information structure to allow supporting multiple info classes in NtQueryDirectoryFile.

The pointer address may set by the type unmarshalling function and
therefore will not be base_ptr_val. This value is the value at
*pPointer and is what needs to be retrieved during subsequent
unmarshalling of the same function.