Improve traces.

alternate formats first before failing.

abusing reply_message.
Allow passing the determined window for a hardware message back to the
server to have it redispatch the message to the correct thread.

  CREATESTRUCT for WM_CREATE/WM_NCCREATE.
- Fix cases where WS_EX_WINDOWEDGE style is applied.
- Tests for the above.

MsiCreateAndVerifyInstallerDirectory stub parameter counts.

Move a header comment for consistency with the other controls.
Very small alignment fixes.

that the volume is correctly read, and is correctly converted to
windows style volume numbers.

processing into a single function.

buffer before trying to recv() from the pipe.

child.