The Old New Thing

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Why doesn’t <CODE>WM_<WBR>ENTER­IDLE</CODE> work if the dialog box is a <CODE>Message­Box</CODE>?

Mar 26, 2026

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Why doesn’t WM_ENTER­IDLE work if the dialog box is a Message­Box?

Raymond Chen

Raymond Chen

Because it opted out.

How can I change a dialog box’s message loop to do a <CODE>Msg­Wait­For­Multiple­Objects</CODE> instead of <CODE>Get­Message</CODE>?

Mar 25, 2026

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How can I change a dialog box’s message loop to do a Msg­Wait­For­Multiple­Objects instead of Get­Message?

Raymond Chen

Raymond Chen

The dialog box lets you change how it waits.

Windows 95 defenses against installers that overwrite a file with an older version

Mar 24, 2026

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Windows 95 defenses against installers that overwrite a file with an older version

Raymond Chen

Raymond Chen

A very primitive version of recovery.

How can I make sure the anti-malware software doesn’t terminate my custom service?

Mar 23, 2026

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How can I make sure the anti-malware software doesn’t terminate my custom service?

Raymond Chen

Raymond Chen

You'll have to ask nicely.

Windows stack limit checking retrospective: arm64, also known as AArch64

Mar 20, 2026

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Windows stack limit checking retrospective: arm64, also known as AArch64

Raymond Chen

Raymond Chen

Wrapping things up.

Windows stack limit checking retrospective: amd64, also known as x86-64

Mar 19, 2026

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Windows stack limit checking retrospective: amd64, also known as x86-64

Raymond Chen

Raymond Chen

Reaching the modern day.

Windows stack limit checking retrospective: Alpha AXP

Mar 18, 2026

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Windows stack limit checking retrospective: Alpha AXP

Raymond Chen

Raymond Chen

Double the size, double the fun.

Windows stack limit checking retrospective: x86-32 also known as i386, second try

Mar 17, 2026

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Windows stack limit checking retrospective: x86-32 also known as i386, second try

Raymond Chen

Raymond Chen

Appeasing the invisible return address predictor.

Windows stack limit checking retrospective: PowerPC

Mar 16, 2026

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Windows stack limit checking retrospective: PowerPC

Raymond Chen

Raymond Chen

Doing the math backwards.

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