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I am trying to use UIAutomation in my project.
I've found out only https://lib.rs/install/uiautomationcore-sys
But there is no documentation how to use it. Maybe anybody knows or there is better way? Thanks!

Hello, I'm struggling with following problem:
I have a BITMAP declared like this

            let mut bmp: BITMAP = mem::uninitialized();

then I'm trying to call a GetObject

                bitmap as HANDLE,
                mem::size_of::<BITMAP>() as i32,
                &mut bmp as * LPVOID,

And I'm getting

error[E0606]: casting `&mut winapi::um::wingdi::BITMAP` as `*mut std::ffi::c_void` is invalid
   --> src\main.rs:118:17
118 |                 &mut bmp as LPVOID,
    |                 ^^^^^^^^^^^^^^^^^^
I've tried different combinations of types in cast expression but still cannot find a correct one
Peter Atashian
@rucoder_gitlab &mut bmp as *mut BITMAP as LPVOID
@rucoder_gitlab Alternatively <*mut _>::cast(&mut bmp)
Thanks. I've figured out it already but the second alternative is unknown to me. I'm still learning Rust :)
as I understand the rule here is : "cast reference to the pointer of the same type and then reinterpret pointer with second 'as'"
Adriano Grieb
hi there! it was probably asked a zillion times, but how do I get data back? I'm trying to get the returned value pvData and pcbData from a call to winapi::um::winreg::RegGetValueA... the function returns ERROR_SUCCESS if I set those both to std::ptr::null_mut(), so all other parameters are OK! I'm just stuck on how do declare those variables and converting then to and from... I'm new to rust!!!
Adriano Grieb
ok, did it! the solution is always simpler than we think....
let mut pvData = vec![0; 2];
let lstatus = unsafe { RegGetValueA(HKEY_CURRENT_USER,
                                        pvData.as_mut_ptr() as *mut c_void,
println!("SUCCESS {:?}", pvData[0]);
this key always has value 0 or 1, or does not exist, so I know a vec with size 2 is precisely what I need...
can you help me
D:/../cargo-cache/bin/cargo.exe build --color=always --all --all-targets
   Compiling proc-macro2 v1.0.19
   Compiling winapi-x86_64-pc-windows-gnu v0.4.0
   Compiling winapi v0.3.9
   Compiling syn v1.0.34
   Compiling memchr v2.3.3
   Compiling log v0.4.11
   Compiling libc v0.2.73
   Compiling pin-project-internal v0.4.22
error: linking with `D:\dev\msys64\mingw32\bin\gcc.exe` failed: exit code: 1
  = note: "D:\\dev\\msys64\\mingw32\\bin\\gcc.exe" "-fno-use-linker-plugin" "-Wl,--nxcompat" "-m64" "-nostartfiles" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\crt2.o" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\rsbegin.o" "-L" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373993d98adf607f.build_script_build.aqdalkxg-cgu.0.rcgu.o" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373"D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373993d98adf607f.build_script_build.aqdalkxg-cgu.8.rcgu.o" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373993d98adf607f.build_script_build.aqdalkxg-cgu.9.rcgu.o" "-o" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373993d98adf607f.exe" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\build\\winapi-x86_64-pc-windows-gnu-373993d98adf607f\\build_script_build-373993d98adf607f.3cs0v1emfhffbtuk.rcgu.o" "-Wl,--gc-sections" "-nodefaultlibs" "-L" "D:\\code\\jrtzcloud\\rust\\quotes-bak-task\\target\\debug\\deps" "-L" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib" "-Wl,--start-group" "-Wl,-Bstatic" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\libstd-67d47d305e6416cf.rlib" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\libpanic_unwind-7a60e9aa38c75ecbcore-56e7371f88c71370.rlib" "-Wl,--end-group" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\libcompiler_builtins-8320c8f14264e1a8.rlib" "-Wl,-Bdynamic" "-ladvapi32" "-lws2_32" "-luserenv" "-lmsvcrt" "-lmingwex" "-lmingw32" "-lmsvcrt" "-luser32" "-lkernel32" "-lgcc_eh" "-l:libpthread.a" "-lgcc" "-lmsvcrt" "-lkernel32" "D:\\rust-toolchain\\toolchains\\stable-x86_64-pc-windows-gnu\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\rsend.o"
  = note: 

error: aborting due to previous error

error: could not compile `winapi-x86_64-pc-windows-gnu`.
what's this problem?
Could you help me, thanks
Peter Atashian
@marvinpan8 That issue is not specific to winapi. Since it appears you are using an external MinGW toolchain it is recommended you disable the bundled MinGW toolchain that Rust provides. It is currently a nightly only feature and you can enable it with the rust flag -Z link-self-contained=no.
Kim Christensen
Hi everyone, I have a quesiton. I'm looking into extending some of the DirectWrite API in winapi, and ran into an issue, I have no idea on how to solve. Taking a look at the DWRITE_COLOR_GLYPH_RUN1 struct, https://docs.microsoft.com/en-us/windows/win32/api/dwrite_3/ns-dwrite_3-dwrite_color_glyph_run1, shows that it uses inheritance. Is this even possible to support in winapi? If it is could someone point me in the right direction?
Peter Atashian
@kichristensen I know I've run into this in the past but I don't remember the exact solution I used.
@kichristensen Okay, I found an existing case. If you have struct FOO: BAR {in C, in Rust you would make the first field of FOO be parent: BAR.
Kim Christensen
@retep998 thank you very much I will try that
Yonggang Luo
Why compier warm std/
= note: the lang item is first defined in crate std (which winapi depends on)
= note: first definition in std loaded from \?\C:\Users\lygstate.rustup\toolchains\nightly-2020-10-01-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\std-d2161836abc64f12.dll, \?\C:\Users\lygstate.rustup\toolchains\nightly-2020-10-01-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libstd-d2161836abc64f12.rlib
= note: second definition in the local crate (rulibc)
error[E0152]: found duplicate lang item `panic_impl`
  --> src\lib.rs:89:1
89 | pub extern "C" fn rust_begin_unwind(pi: &::core::panic::PanicInfo) -> ! {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: the lang item is first defined in crate `std` (which `winapi` depends on)
whichwinapidepends on
How to import winapi and not fetch std?
Guy Tabak
Hi, I am trying to create a callback interface class, to communicate with BITS service through com api.
Is there any example of how to implement such an interface?
The interface I need to implement:
There is an example for cpp, and I would need to implement it in rust.
I'm trying to call winapi::um::memoryapi::VirtualAllocEx but it claims it can't find "memoryapi" in "um"
@dotqurter You need to use winapi = { version = "...", features = ["memoryapi"] } in deps
@GuyTabak just create a repr(C) struct with the vtable of the interface as the first element
Then cast as needed
Aleksander Litynski
Does anyone know why this array is constrained to only one item? https://docs.rs/winapi/0.3.9/winapi/um/winnt/struct.TOKEN_PRIVILEGES.html#structfield.Privileges
It seems like in order to set multiple privileges, I would need multiple items in the array, per https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-token_privileges