The Old New Thing

Practical development throughout the evolution of Windows.

Latest posts

Why is the Windows clipboard taking the scenic route when converting from <CODE>CF_<WBR>TEXT</CODE> to <CODE>CF_<WBR>OEM­TEXT</CODE>?
Dec 16, 2025
Post comments count 0
Post likes count 1

Why is the Windows clipboard taking the scenic route when converting from CF_TEXT to CF_OEM­TEXT?

Raymond Chen
Raymond Chen

Something is forcing it down an alternate path.

Misunderstanding what the Cricket Celebration Bowl is
Dec 15, 2025
Post comments count 2
Post likes count 0

Misunderstanding what the Cricket Celebration Bowl is

Raymond Chen
Raymond Chen

Apparently, not a bowl of crickets.

The Windows clipboard automatic text conversion algorithm is path-dependent
Dec 15, 2025
Post comments count 1
Post likes count 2

The Windows clipboard automatic text conversion algorithm is path-dependent

Raymond Chen
Raymond Chen

When the journey is not half of the fun.

Resolving an ambiguity in the Windows clipboard automated text conversion table
Dec 12, 2025
Post comments count 6
Post likes count 2

Resolving an ambiguity in the Windows clipboard automated text conversion table

Raymond Chen
Raymond Chen

Who goes first?

Studying the various locale mismatch scenarios in Windows clipboard text format synthesis
Dec 11, 2025
Post comments count 8
Post likes count 2

Studying the various locale mismatch scenarios in Windows clipboard text format synthesis

Raymond Chen
Raymond Chen

If they don't match, then the 8-bit strings are basically broken already.

How does Windows synthesize the <CODE>CF_<WBR>LOCALE</CODE> clipboard format?
Dec 10, 2025
Post comments count 1
Post likes count 1

How does Windows synthesize the CF_LOCALE clipboard format?

Raymond Chen
Raymond Chen

Getting it from a place that might have been obvious in the past, but maybe not today.

How does Windows synthesize <CODE>CF_<WBR>UNICODE­TEXT</CODE> from <CODE>CF_<WBR>TEXT</CODE> and vice versa?
Dec 9, 2025
Post comments count 2
Post likes count 2

How does Windows synthesize CF_UNICODE­TEXT from CF_TEXT and vice versa?

Raymond Chen
Raymond Chen

Let's ask the locale.

How does Windows synthesize <CODE>CF_<WBR>OEM­TEXT</CODE> from <CODE>CF_<WBR>TEXT</CODE> and vice versa?
Dec 8, 2025
Post comments count 12
Post likes count 3

How does Windows synthesize CF_OEM­TEXT from CF_TEXT and vice versa?

Raymond Chen
Raymond Chen

Starting with the easy case, or at least it looks easy.

How can my process read its own standard output?
Dec 5, 2025
Post comments count 11
Post likes count 3

How can my process read its own standard output?

Raymond Chen
Raymond Chen

You'll have to trick yourself before anybody notices, which may not be possible.