win32-ffi
v0.0.6-alpha.5
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js/ts win32 api base on ffi
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win32-ffi
win32 api binding for js/ts that powered by node-ffi
Install
npm i win32-ffi
/yarn add win32-ffi
Tutorial
- Since ffi cannot use the macro function of c++ #define, MAKEWPARAM, MAKELPARAM, etc. can only realize the operation of the numbers. For details, please refer to the document of
user_macro_fns.ts
export const MAKELONG = (a: number, b: number): number => (a & 0xfff) | ((b & 0xfff) << 16);
- ffi cannot force type conversion, so you need to use refType to define the type
c++
MOUSEHOOKSTRUCT* mouse = (MOUSEHOOKSTRUCT*)(lParam)
ts
ffi.Callback(CPP.LRESULT, [CPP.INT, CPP.WPARAM, ref.refType(CPP.MOUSEHOOKSTRUCT)],(nCode: TS.INT, wParam: TS.WPARAM, lParam: TS.RefStruct) => {})
Electron
// get system endianness, cast Buffer to decimal
const bufferCastInt32 = function (buf: Buffer): number {
return os.endianness() == "LE" ?
buf.readInt32LE() : buf.readInt32BE();
};
const mainWindow = new BrowserWindow({
frame: false,
transparent: true,
webPreferences: {
nodeIntegration: true,
webSecurity: false,
webviewTag: true,
sandbox: false,
enableRemoteModule: true
}
});
const decimalHwnd = bufferCastInt32(mainWindow.getNativeWindowHandle());
SetWindowPos(decimalHwnd, 0, 0, 0, 100, 100, CPP.SWP_NOZORDER);
Samples
- Create thread
const { Win32ffi, ffi, CPP, L, NULL } = require('win32-ffi');
const { CreateThread, MessageBoxW } = new Win32ffi().winFns();
const proc = ffi.Callback(CPP.INT, [CPP.PVOID], () => {
MessageBoxW(0, L("exmpale"), null, CPP.MB_OK | CPP.MB_ICONEXCLAMATION);
});
CreateThread(null, 0, proc, NULL, 0, NULL);
- Create Mouse Hook
const _createMouseHookProc = () => ffi.Callback(CPP.LRESULT, [CPP.INT, CPP.WPARAM, ref.refType(CPP.StructMOUSEHOOKSTRUCT)],
(nCode: TS.INT, wParam: TS.WPARAM, lParam: TS.RefStruct) => {
const mouse: TS.MOUSEHOOKSTRUCT = lParam.deref();
const pt = mouse.pt;
const { x, y } = pt;
const currentHwnd = WindowFromPoint(mouse.pt);
return CallNextHookEx(0, nCode, wParam, lParam); // need overwrite
}
)
const _mouseHook = SetWindowsHookExW(CPP.WH_MOUSE_LL, this._createMouseHookProc(), 0, 0);
const msg: TS.RefStruct = new CPP.StructMSG();
while (GetMessageW(msg.ref(), 0, 0, 0) && this._trigger) {
TranslateMessage(msg.ref());
DispatchMessageW(msg.ref());
}
UnhookWindowsHookEx(_mouseHook);
More Examples
API DOCS
Main Api
- Win32ffi
const win32ffi =new Win32ffi();
win32ffi.user32();
win32ffi.kernel32();
const winFns = win32ffi.winFns(); // include user32 and kernel32
const _createEnumWindowProc = () => ffi.Callback(CPP.BOOL, [CPP.HWND, CPP.LPARAM],
(hWnd: TS.HWND) => {
......
return true;
});
winFns.EnumWindows(this._createEnumWindowProc(), 0);
const tmp: TS.HWND = FindWindowExW(0, 0, L('progman'), null);
- ref see http://tootallnate.github.io/ref/
- ffi https://www.npmjs.com/package/ffi-napi
- NULL = ref.NULL
- Struct
win320ffi provides litte struct e.g
StructRECT
StructMSG
StructMOUSEHOOKSTRUCT
... see win_user_struct.ts for more details
import {ref, StructType,CPP} from 'win32-ffi';
const Struct = StructType(ref);
const MSG = Struct({
hwnd: CPP.HWND,
message: CPP.UINT,
wParam: CPP.WPARAM,
lParam: CPP.LPARAM,
time: CPP.DWORD,
pt: CPP.POINT
});
const msg = new MSG();
console.log(msg.ref());
- TS: ts types
- CPP: c++ types that refer to ffi
Warning
- If you can't get the certain C++ parameter types, you can create a file and rewrite this function
overwrite.ts
import { CPP, ref } from 'win32-ffi';
export const customFns = {
CallNextHookEx: [CPP.LRESULT, [CPP.HHOOK, CPP.INT, CPP.WPARAM, ref.refType(CPP.MOUSEHOOKSTRUCT)]]
};
index.ts
import { customFns } from './overwrite';
Win32ffi.assign({ user32Fns: customFns });
- win32-ffi does not include Comctl32, because almost all macro-defined functions, but you can use
SendMessage
to achieve, win32ffi provides - It is impossible to include all win32 api. If there is no prompt, it means you need to define it by yourself. And you can get type details from visual studio.
License
The scripts and documentation in this project are released under the Apache 2.0 License