microsoft/win32metadata

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Tooling to generate metadata for Win32 APIs in the Windows SDK.

Stars: 1.5k
Forks: 148
Open beginner issues: 6
Indexed issues: 164
Avg merge: 5d 16h
Merged PRs (30d): 4

Dominant language: C++
License: No license data
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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164 open issues indexed

Add APPX_SIP_CLIENT_DATA, SIGNER_SIGN_EX2_PARAMS and SIGNER_SIGN_EX3_PARAMS for app package signing Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

microsoft/win32metadata#2307 · Opened Sep 11, 2026
`NtCreateNamedPipeFile` added to the Windows SDK Open

Difficulty 3/5 1-2 days Newbie friendliness 66/100

microsoft/win32metadata#2302 · Opened Sep 9, 2026
`IShellLinkW::Resolve()` requires `CanReturnMultipleSuccessValues` annotation. Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

microsoft/win32metadata#2301 · Opened Sep 4, 2026
`MSITRANSFORM_VALIDATE_LANGUAGE` not emitting with `[Flags]` in CsWin32. Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2297 · Opened Aug 28, 2026
`IPersistFile.GetCurrentFile()` requires `CanReturnMultipleSuccessValues` annotation. Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

microsoft/win32metadata#2296 · Opened Aug 28, 2026
Make `WinHttpReceiveResponse` `lpreserved` "optional" Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

microsoft/win32metadata#2282 · Opened Aug 1, 2026
WHV_UINT128 / WHV_REGISTER_VALUE missing 16-byte alignment (DECLSPEC_ALIGN(16) dropped) → WHP register calls fault Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2278 · Opened Jul 17, 2026
Add RAII (CloseApi) annotation for PIDL types (ITEMIDLIST) so CsWin32 generates an ILFree SafeHandle Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/win32metadata#2275 · Opened Jul 11, 2026
Update the win32metadata project to the latest AgilitySDK release Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

microsoft/win32metadata#2269 · Opened Jun 18, 2026
Missing CreateVssBackupComponents Open

question

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/win32metadata#2270 · 2 comments · Opened Jun 13, 2026
SupportedArchitectureAttribute inconsistency Open

Difficulty 4/5 3-5 days Newbie friendliness 40/100

microsoft/win32metadata#2267 · Opened Jun 12, 2026
Missing P/Invokes for publicly documented Dism methods like `DismOpenSession`, etc. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/win32metadata#2265 · 5 comments · 1 reaction · Opened Jun 3, 2026
Ansi/Unicode attributes for constants Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2255 · Opened May 5, 2026
WIN32_FIND_DATAA issue with CfGetPlaceholderStateFromFindData and FindFirstFile Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2252 · Opened Apr 30, 2026
Add PF_ARM_V82_FHM and PF_ARM_V83_FCMA to PROCESSOR_FEATURE_ID / IsProcessorFeaturePresent Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/win32metadata#2250 · 2 comments · Opened Apr 30, 2026
E_NOTFOUND returns the infotech.h value instead of the Win32 error HRESULT Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

microsoft/win32metadata#2251 · 2 comments · Opened Apr 29, 2026
EncodeRemotePointer/DecodeRemotePointer incorrectly point to api-ms-win-core-util-l1-1-1.dll Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/win32metadata#2249 · Opened Apr 28, 2026
TSF APIs missing: EnumEnabledLayoutOrTip Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2245 · Opened Apr 17, 2026
Error in the return type of the `GetProp` and `RemoveProp` function Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2259 · 1 comment · Opened Apr 6, 2026
COM activation on ARM64 hangs when PreferredServerBitness ≠ 0 — missing HRESULT for invalid configuration Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/win32metadata#2242 · 1 comment · Opened Apr 4, 2026
Some `IO_REPARSE_TAG_` constants are signed instead of unsigned Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2241 · 2 comments · Opened Apr 1, 2026
ID3D11DeviceContext is `Sync` despite the docs saying otherwise Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

microsoft/win32metadata#2239 · 15 comments · Opened Mar 30, 2026
`EnumWindows` is incorrectly translated to `Result<()>` Open

question

Difficulty 3/5 1-2 days Newbie friendliness 50/100

microsoft/win32metadata#2238 · 3 comments · Opened Mar 27, 2026
`FindWindow()` as emitted in CsWin32 has `SetLastError = true` despite the docs saying "This function does not modify the last error value.". Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

microsoft/win32metadata#2235 · 1 comment · Opened Mar 25, 2026
Add an `InternetShortcut` coclass for `IUniformResourceLocatorW`? Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/win32metadata#2260 · 4 comments · Opened Mar 16, 2026
The MSI summary information constant `PID_SECURITY` is defining as `2147483650U` and not `19`. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2223 · 1 comment · Opened Feb 24, 2026
Several base relocation types are missing. Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/win32metadata#2221 · Opened Feb 20, 2026
None of the kernel GFlags are within win32metatdata. Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/win32metadata#2220 · Opened Feb 19, 2026
The enum `IMAGE_DEBUG_TYPE` is incomplete Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/win32metadata#2219 · 1 comment · Opened Feb 19, 2026
`WinVerifyTrust()` takes `pgActionId` (Guid) by ref and not as an in parameter. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

microsoft/win32metadata#2292 · 5 comments · Opened Feb 17, 2026
`SECPKG_FUNCTION_TABLE`: Members `LogonUser` and `LogonUserEx` are captured as `LogonUserA` / `LogonUserExA` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2210 · 1 reaction · Opened Feb 9, 2026
Add multiple AlsoUsableFor for autotype Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2208 · Opened Feb 8, 2026
DEVMODE struct Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2204 · Opened Feb 2, 2026
Suspicious duplicate structs that differ in architecture and pack only Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2203 · 3 comments · Opened Feb 2, 2026
Annotate struct size fields in metadata Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/win32metadata#2202 · 5 comments · Opened Jan 30, 2026
Exempt OleConvertIStorageToOLESTREAM / OleConvertIStorageToOLESTREAMEx from returning OLESTREAM Open

question

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2207 · 5 comments · Opened Jan 29, 2026
CHILDID_SELF should be a signed integer Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/win32metadata#2201 · 1 reaction · Opened Jan 27, 2026
Missing constants for DCompositionCreateSurfaceHandle Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/win32metadata#2200 · Opened Jan 25, 2026
How to generate anonymous enums into a enum Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2199 · 3 comments · Opened Jan 24, 2026
DEVINSTID in many calls should be const Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2188 · 6 comments · Opened Dec 27, 2025
IBindContext.RegisterObjectParam needs [Const] on the PWSTR in parameter Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

microsoft/win32metadata#2183 · 1 comment · Opened Dec 17, 2025
Should the Msi* methods be returning a WIN32_ERROR? Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2181 · 1 comment · Opened Dec 15, 2025
Constants like `MSIDBOPEN_PATCHFILE`, et al, should be PCWSTR-typed like others are. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2179 · 5 comments · Opened Nov 29, 2025
Friendly overload for MsiFormatRecord() can't accept a null hInstall value. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/win32metadata#2178 · 1 comment · Opened Nov 29, 2025
Friendly overload for `MsiGetSummaryInformation()` can't accept a null hDatabase value. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/win32metadata#2177 · 2 comments · Opened Nov 29, 2025
Friendly overloads for Msi* methods don't seem to be as good as they could be. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/win32metadata#2173 · 3 comments · Opened Nov 27, 2025
The friendly overload for `NtQueryInformationProcess()`/`NtQuerySystemInformation()` uses `void* ProcessInformation` instead of `Span<byte>` unlike other like Nt* functions. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

microsoft/win32metadata#2164 · 1 comment · Opened Nov 24, 2025
The friendly wrappers for `NtQueryInformationProcess()`/`NtQueryObject()`/`NtQuerySystemInformation()` should be `out uint ReturnLength`, not `ref`. Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

microsoft/win32metadata#2165 · 2 comments · Opened Nov 24, 2025
The friendly wrapper for `GetNamedSecurityInfo()` should return `ppSecurityDescriptor` as a `LocalFreeSafeHandle`. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/win32metadata#2168 · 1 comment · Opened Nov 24, 2025
The friendly overload for `SetEntriesInAcl()` is still not 100% correct. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/win32metadata#2167 · 1 comment · Opened Nov 24, 2025

microsoft/win32metadata

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