├── README.md
└── main.go


/README.md:
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 1 | # Windows-API-Capture-Webcam
 2 | Use Windows API to capture a image from a Webcam in GoLANG
 3 |  
 4 | # Other
 5 | Go is a amazing and powerful programming language. If you already haven't, check it out; https://golang.org/
 6 | 
 7 | # Donations
 8 | <img src="https://blockchain.info/Resources/buttons/donate_64.png"/>
 9 | <p align="center">Please Donate To Bitcoin Address: <b>1AEbR1utjaYu3SGtBKZCLJMRR5RS7Bp7eE</b></p>
10 | 


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/main.go:
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 1 | package main
 2 | 
 3 | import (
 4 | 	"bytes"
 5 | 	"fmt"
 6 | 	"io"
 7 | 	"io/ioutil"
 8 | 	"os"
 9 | 	"os/exec"
10 | 	"syscall"
11 | 	"unsafe"
12 | 
13 | )
14 | 
15 | var (
16 | 	avicap32   = syscall.NewLazyDLL("avicap32.dll")
17 | 	proccapCreateCaptureWindowA  = avicap32.NewProc("capCreateCaptureWindowA")
18 | 	
19 | 	user32  = syscall.NewLazyDLL("user32.dll")
20 | 	procSendMessageA = user32.NewProc("SendMessageA")
21 | )
22 | 
23 | func CaptureWebcam() {
24 | 	var name = "WebcamCapture"
25 | 	handle, _, _ := proccapCreateCaptureWindowA.Call(uintptr(unsafe.Pointer(&name)), 0, 0, 0, 320, 240, 0, 0)
26 | 	procSendMessageA.Call(handle, 0x40A, 0, 0) //WM_CAP_DRIVER_CONNECT
27 | 	procSendMessageA.Call(handle, 0x432, 30, 0) //WM_CAP_SET_PREVIEW
28 | 	procSendMessageA.Call(handle, 0x43C, 0, 0) //WM_CAP_GRAB_FRAME
29 | 	procSendMessageA.Call(handle, 0x41E, 0, 0) //WM_CAP_EDIT_COPY
30 | 	procSendMessageA.Call(handle, 0x40B, 0, 0) //WM_CAP_DRIVER_DISCONNECT
31 | 	camera, err := os.Create("Image.png")
32 | 	if err != nil {
33 | 	fmt.Println(err)
34 | 		return
35 | 	}
36 | 	clip, err := readClipboard()
37 | 	if err != nil {
38 | 	fmt.Println(err)
39 | 		return
40 | 	}
41 | 	_, err = io.Copy(camera, clip)
42 | 	if err != nil {
43 | 	fmt.Println(err)
44 | 		return
45 | 	}
46 | 	camera.Close()
47 | }
48 | 
49 | func readClipboard() (io.Reader, error) {
50 | 	f, err := ioutil.TempFile("", "")
51 | 	if err != nil {
52 | 	fmt.Println(err)
53 | 		return nil, err
54 | 	}
55 | 	f.Close()
56 | 	_, err = exec.Command("PowerShell", "-Command", "Add-Type", "-AssemblyName", fmt.Sprintf("System.Windows.Forms;$clip=[Windows.Forms.Clipboard]::GetImage();if ($clip -ne $null) { $clip.Save('%s') };", f.Name())).CombinedOutput()
57 | 	if err != nil {
58 | 	fmt.Println(err)
59 | 		return nil, err
60 | 	}
61 | 	r := new(bytes.Buffer)
62 | 	file, err := os.Open(f.Name())
63 | 	if err != nil {
64 | 	fmt.Println(err)
65 | 		return nil, err
66 | 	}
67 | 	if _, err := io.Copy(r, file); err != nil {
68 | 	fmt.Println(err)
69 | 		return nil, err
70 | 	}
71 | 	file.Close()
72 | 	os.Remove(f.Name())
73 | 	return r, nil
74 | }
75 | 
76 | func main() {
77 | 	CaptureWebcam()
78 | }


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