The EMF documentation folks wrote back. It turns out that not only is there no default clip region, but if any mode but RGN_COPY is used first GDI will combine whatever random data is sitting where the "existing" clip path is in memory with the OR, XOR, AND, or DIFF, producing undefined results.
The EMF documentation folks wrote back. It turns out that not only is there no default clip region, but if any mode but RGN_COPY is used first GDI will combine whatever random data is sitting where the "existing" clip path is in memory with the OR, XOR, AND, or DIFF, producing undefined results.