windows – Pupli

Take screenshot of a portion of screen using C#

April 4, 2020 - by mhdr

Rectangle rect = new Rectangle(0, 0, 100, 100);
Bitmap bmp = new Bitmap(rect.Width, rect.Height, PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bmp);
g.CopyFromScreen(rect.Left, rect.Top, 0, 0, bmp.Size, CopyPixelOperation.SourceCopy);
bmp.Save(fileName, ImageFormat.Jpeg);

References
https://stackoverflow.com/questions/3306600/c-how-to-take-a-screenshot-of-a-portion-of-screen

Getting Mouse position in Python

April 4, 2020April 4, 2020 - by mhdr

from ctypes import windll, Structure, c_long, byref

class POINT(Structure):
    _fields_ = [("x", c_long), ("y", c_long)]

def queryMousePosition():
    pt = POINT()
    windll.user32.GetCursorPos(byref(pt))
    return { "x": pt.x, "y": pt.y}

pos = queryMousePosition()
print(pos)

References
https://stackoverflow.com/questions/3698635/getting-cursor-position-in-python

Move and Click Mouse in C#

March 31, 2020 - by mhdr

[DllImport("user32.dll")]
public static extern void mouse_event(MouseEventFlags dwFlags, uint dx, uint dy, uint dwData, MouseEventDataXButtons dwExtraInfo);

[DllImport("User32.Dll")]
public static extern long SetCursorPos(int x, int y);

[Flags]
public enum MouseEventFlags : uint
{
    LEFTDOWN = 0x00000002,
    LEFTUP = 0x00000004,
    MIDDLEDOWN = 0x00000020,
    MIDDLEUP = 0x00000040,
    MOVE = 0x00000001,
    ABSOLUTE = 0x00008000,
    RIGHTDOWN = 0x00000008,
    RIGHTUP = 0x00000010,
    WHEEL = 0x00000800,
    XDOWN = 0x00000080,
    XUP = 0x00000100
}

//Use the values of this enum for the 'dwData' parameter
//to specify an X button when using MouseEventFlags.XDOWN or
//MouseEventFlags.XUP for the dwFlags parameter.
public enum MouseEventDataXButtons : uint
{
    XBUTTON1 = 0x00000001,
    XBUTTON2 = 0x00000002
}

public static void MoveMouse(int x, int y)
{
    PInvoke.SetCursorPos(x, y);
}

public static void ClickMouse(int x, int y)
{
    PInvoke.mouse_event(MouseEventFlags.LEFTDOWN | MouseEventFlags.ABSOLUTE, (uint)x, (uint)y, 0, 0);
    Thread.Sleep(10);
    PInvoke.mouse_event(MouseEventFlags.LEFTUP | MouseEventFlags.ABSOLUTE, (uint)x, (uint)y, 0, 0);
}

References
https://stackoverflow.com/questions/13520705/move-mouse-to-position-and-left-click
http://www.pinvoke.net/default.aspx/user32.mouse_event
https://stackoverflow.com/questions/8050825/how-to-move-mouse-cursor-using-c
https://www.pinvoke.net/default.aspx/user32.setcursorpos

Take Screenshot in C#

March 31, 2020March 31, 2020 - by mhdr

First Set Process DPI Aware:

Get Screen Size on C#
https://pupli.net/2020/03/get-screen-size-on-c/

private void takeScreenShot()
{
    Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        g.CopyFromScreen(0, 0, 0, 0, Screen.PrimaryScreen.Bounds.Size);
        bmp.Save("screenshot.png");  // saves the image
    }                 
}

References
https://codingvision.net/miscellaneous/c-get-desktop-screenshot

Get Screen Size on C#

March 31, 2020March 31, 2020 - by mhdr - 1 Comment

The process is running under DPI virtualization. So we should apply the DPI aware manifest option to stop DPI virtualization

[DllImport("user32.dll", SetLastError=true)]
static extern bool SetProcessDPIAware();

Then

public enum SystemMetric
{
    VirtualScreenWidth = 78, // CXVIRTUALSCREEN 0x0000004E 
    VirtualScreenHeight = 79, // CYVIRTUALSCREEN 0x0000004F 
}

[DllImport("user32.dll")]
public static extern int GetSystemMetrics(SystemMetric metric);

public static Size GetVirtualDisplaySize()
{
    var width = GetSystemMetrics(SystemMetric.VirtualScreenWidth);
    var height = GetSystemMetrics(SystemMetric.VirtualScreenHeight);

    return new Size(width, height);
}

References
https://stackoverflow.com/questions/28339257/getsystemmetrics-and-tscreen-returns-wrong-value
https://www.pinvoke.net/default.aspx/user32/SetProcessDPIAware.html
https://stackoverflow.com/questions/1317235/c-get-complete-desktop-size
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setprocessdpiaware

relative path in Windows bat script

November 24, 2019November 26, 2019 - by mhdr

%~dp0\bin\Iris.exe

%~dp0 resolves to the full path of the folder in which the batch script resides.

venv\Scripts\python.exe main.py

References
https://stackoverflow.com/questions/14936625/relative-path-in-bat-script/14942944

Take Screenshot on Windows Using Python

January 22, 2019January 22, 2019 - by mhdr

from PIL import ImageGrab
im = ImageGrab.grab()
im.save('screenshot.png')

import win32gui, win32ui, win32con, win32api
hwin = win32gui.GetDesktopWindow()
width = win32api.GetSystemMetrics(win32con.SM_CXVIRTUALSCREEN)
height = win32api.GetSystemMetrics(win32con.SM_CYVIRTUALSCREEN)
left = win32api.GetSystemMetrics(win32con.SM_XVIRTUALSCREEN)
top = win32api.GetSystemMetrics(win32con.SM_YVIRTUALSCREEN)
hwindc = win32gui.GetWindowDC(hwin)
srcdc = win32ui.CreateDCFromHandle(hwindc)
memdc = srcdc.CreateCompatibleDC()
bmp = win32ui.CreateBitmap()
bmp.CreateCompatibleBitmap(srcdc, width, height)
memdc.SelectObject(bmp)
memdc.BitBlt((0, 0), (width, height), srcdc, (left, top), win32con.SRCCOPY)
bmp.SaveBitmapFile(memdc, 'screenshot.bmp')

Don’t forget to SetProcessDPIAware if necessary

import ctypes

user32 = ctypes.windll.user32
user32.SetProcessDPIAware()

References
https://stackoverflow.com/questions/4589206/python-windows-7-screenshot-without-pil

Get Screen Size in Python using Win32

January 22, 2019January 22, 2019 - by mhdr

import ctypes
user32 = ctypes.windll.user32
user32.SetProcessDPIAware()
screensize = user32.GetSystemMetrics(0), user32.GetSystemMetrics(1)
print(screensize)

References
https://stackoverflow.com/questions/3129322/how-do-i-get-monitor-resolution-in-python
https://stackoverflow.com/questions/32541475/win32api-is-not-giving-the-correct-coordinates-with-getcursorpos-in-python