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##### Activity
MarvinPan
@marvinpan8
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:

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
@retep998
@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
@kichristensen
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
@retep998
@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
@kichristensen
@retep998 thank you very much I will try that
Yonggang Luo
@lygstate
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
@GuyTabak
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:
https://docs.microsoft.com/en-us/windows/win32/api/bits/nn-bits-ibackgroundcopycallback
There is an example for cpp, and I would need to implement it in rust.
echo!
@dotqurter
I'm trying to call winapi::um::memoryapi::VirtualAllocEx but it claims it can't find "memoryapi" in "um"
nicbn
@nicbn
@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
@AleksLitynski
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
R030t1
@R030t1

I’m just getting started with winapi-rs. Any idea why I can’t use winapi::um::minwinbase::SECURITY_ATTRIBUTES:

error[E0432]: unresolved import winapi::um::minwinbase
--> src/main.rs:4:17
|
4 | use winapi::um::minwinbase::SECURITY_ATTRIBUTES;
|                 ^^^^^^^^^^ Could not find minwinbase in um

I found this in Google search. I have a similar problem, how did you fix it? I get expected struct winapi::minwinbase::SECURITY_ATTRIBUTES, found struct winapi::um::minwinbase::SECURITY_ATTRIBUTES 

@endeav0r
You posted that in 2018
endeav0r
@endeav0r
Lol.
R030t1
@R030t1
I'm pulling in winapi = {version = "*", features = ["minwinbase", "winuser"]} and just added minwinbase. This added "stuff" however the namespace winapi::minwinbase still does not exist. Are some of them not exported for some reason?
What is actually going on with the namespaces
endeav0r
@endeav0r
My guess is your passing something between different versions of winapi-rs, or you need to use winapi::um::minwinbase
R030t1
@R030t1
When I try to call CreateThread it is explicitly telling me I can't use winapi::um::minwinbase::SECURITY_ATTRIBUTE, I have to use the one in winapi::minwinbase.
But winapi::minwinbase doesn't exist for me.
R030t1
@R030t1
Sigh. I solved this before with a double cast, but I can not understand the namespacing.
For posterity, I use let mut attrib = ... then &mut attrib *mut _ as *mut _.
So if anyone knows it would be worth putting in documentation
herbyboi
@herbyboi

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

I'm also curious about how to read multiple entries and evaluate the size of such struct when used as a buffer.

Frank Buss
@Frank-Buss
I wrote a simple program to get the active window title, see below. But I'm not sure how to create and pass an empty string to be filled from a Windows function and then convert it to a Rust String. My program works, but is there an easier way to do it, maybe with OsStrExt? Also is the rest of the program ok? I'm relatively new to Rust itself.
use std::io::{Error, ErrorKind};
use winapi;
use winapi::shared::minwindef::*;
use winapi::shared::windef::*;

fn get_active_window_title() -> Result<String, Error> {
let handle = unsafe { winapi::um::winuser::GetForegroundWindow() };
if handle as UINT == winapi::um::winuser::WM_NULL {
return Err(Error::new(ErrorKind::Other, "GetForegroundWindow failed"));
}

let title = unsafe {
const MAX_TITLE_LENGTH: usize = 255;
let mut v: [u16; MAX_TITLE_LENGTH] = [0; MAX_TITLE_LENGTH];
winapi::um::winuser::GetWindowTextW(handle as HWND, v.as_mut_ptr(), MAX_TITLE_LENGTH as i32);
};

Ok(title)
}

fn main() {
println!(
"active window title: {}",
get_active_window_title().unwrap()
);
}`
And I noticed that "handle" has a different type than "WM_NULL". Is it right to cast like I did in my program?
azimuthdeveloper
@azimuthdeveloper
hey everyone, i'm trying to use this crate to mute/unmute the audio on the current system
i know that i have to use something like GetDefaultAudioEndpoint and then call mute or unmute on that
but i can't quite seem t oget it working