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GetConsoleScreenBufferInfoEx, return value, GetLastError? #12064

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opened 2026-01-31 03:05:26 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 03:05:26 +00:00
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Originally created by @vefatica on GitHub (Jan 14, 2021).

Environment

v:> ver
TCC 27.00.18 x64
Microsoft Windows 10 Pro for Workstations
10.0.19042.746 (2009, 20H2)
WindowsTerminalPreview_1.5.3242.0_x64

Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd]
Windows Terminal version (if applicable):

Any other software?

Steps to reproduce

See below.

Expected behavior

Something else.

Actual behavior

Here's some code I'm using to test an unrelated ussue. Sorry it uses a bit of plugin interface language. You'll get the gist.

	CONOUT conout;
	CONSOLE_SCREEN_BUFFER_INFOEX csbiex = {sizeof(CONSOLE_SCREEN_BUFFER_INFOEX), 0};
	if ( GetConsoleScreenBufferInfoEx(conout.h, &csbiex) == FALSE );
		TCError(GetLastError(), NULL);
	for ( INT i=0; i<16; i++ )
		Printf(L"Color %d = 0x%06lX\r\n", i, csbiex.ColorTable[i]);

If it's run in WT, in OpenConsole, or in conhost it produces (snipped) ...

image

... apparently succeeding but returning FALSE with GetLastError() == 0.

Originally created by @vefatica on GitHub (Jan 14, 2021). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment v:\> ver TCC 27.00.18 x64 Microsoft Windows 10 Pro for Workstations 10.0.19042.746 (2009, 20H2) WindowsTerminalPreview_1.5.3242.0_x64 ```none Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd] Windows Terminal version (if applicable): Any other software? ``` # Steps to reproduce <!-- A description of how to trigger this bug. --> See below. # Expected behavior Something else. <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> # Actual behavior <!-- What's actually happening? --> Here's some code I'm using to test an unrelated ussue. Sorry it uses a bit of plugin interface language. You'll get the gist. ``` CONOUT conout; CONSOLE_SCREEN_BUFFER_INFOEX csbiex = {sizeof(CONSOLE_SCREEN_BUFFER_INFOEX), 0}; if ( GetConsoleScreenBufferInfoEx(conout.h, &csbiex) == FALSE ); TCError(GetLastError(), NULL); for ( INT i=0; i<16; i++ ) Printf(L"Color %d = 0x%06lX\r\n", i, csbiex.ColorTable[i]); ``` If it's run in WT, in OpenConsole, or in conhost it produces (snipped) ... ![image](https://user-images.githubusercontent.com/61856645/104546488-4e5f8580-55fa-11eb-81b6-9a1201ccbb50.png) ... apparently succeeding but returning FALSE with GetLastError() == 0.
claunia added the Needs-TriageResolution-ExternalNeeds-Tag-FixNeeds-Attention labels 2026-01-31 03:05:26 +00:00
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Reference: starred/terminal#12064
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