/// <summary>
/// 获取指定窗口的设备上下文句柄
/// </summary>
/// <param name="hwnd">将获取其设备场景的窗口的句柄。若为 0，则要获取整个屏幕的DC</param>
/// <returns><see cref="NativeApiResult{IntPtr}.Result"/>指定窗口的设备上下文的句柄，出错则为 0</returns>
public static NativeApiResult <IntPtr> GetDC(IntPtr hwnd)
{
NativeApiResult <IntPtr> result = null;
var dcIntPtr = GetDCNative(hwnd);
var errorCode = NativeApiResult.GetLastError();
result = new NativeApiResult <IntPtr>(dcIntPtr, errorCode);
return(result);
}
/// <summary>
/// 使用指定的新值替换指定窗口的有关信息
/// </summary>
/// <param name="hWnd">窗口的句柄</param>
/// <param name="type">设置的信息的类型</param>
/// <param name="newValue">新的值</param>
/// <returns><see cref="NativeApiResult{Int32}.Result"/> 值表示替换前的值</returns>
public static NativeApiResult <Int32> SetWindowLong(IntPtr hWnd, WindowsLongType type, Int32 newValue)
{
NativeApiResult <Int32> result = null;
var value = SetWindowLongNative(hWnd, (Int32)type, (Int32)newValue);
var errorCode = NativeApiResult.GetLastError();
result = new NativeApiResult <Int32>(value, errorCode);
return(result);
}
/// <summary>
/// 释放由 <see cref="GetDC(IntPtr)"/> 函数获取的上下文句柄关联的资源
/// </summary>
/// <param name="hwnd">窗体的句柄</param>
/// <param name="hdc">上下文的句柄</param>
/// <returns><see cref="NativeApiResult{Int32}.Result"/>执行成功为1，否则为 0</returns>
public static NativeApiResult <Int32> ReleaseDC(IntPtr hwnd, IntPtr hdc)
{
NativeApiResult <Int32> result = null;
var releaseResult = ReleaseDCNative(hwnd, hdc);
var errorCode = NativeApiResult.GetLastError();
result = NativeApiResult.Create(releaseResult, errorCode);
return(result);
}
/// <summary>
/// 设置进程 Dpi 感知的类型，
/// 此函数在 Windows Vista 以及以上的系统中受支持，
/// 否则调用无效，返回 <see cref="LastErrorCode.UnKnown"/> 未知错误的结果。
/// </summary>
public static NativeApiResult <Int32> SetProcessDpiAwareness(ProcessDPIAwareness dpiAwarenessValue)
{
NativeApiResult <Int32> result = null;
if (Environment.OSVersion.Version.Major >= 6 && Environment.OSVersion.Version.Minor >= 2)
{
var setResult = SetProcessDpiAwarenessNative((Int32)dpiAwarenessValue);
result = NativeApiResult.Create(setResult, NativeApiResult.GetLastError());
}
else
{
result = NativeApiResult.Create(-1, (Int32)LastErrorCode.UnKnown);
}
return(result);
}
/// <summary>
/// 获取指定设备上下文中具体位置上的像素信息
/// </summary>
/// <param name="hdc">设备上下文的句柄</param>
/// <param name="nXPos">像素点的横向坐标</param>
/// <param name="nYPos">像素点的纵向坐标</param>
/// <returns>结果1 表示尝试转换的颜色信息对象，结果2 表示原始的像素信息</returns>
public static NativeApiResult <Color?, UInt32> GetPixel(IntPtr hdc, Int32 nXPos, Int32 nYPos)
{
NativeApiResult <Color?, UInt32> result = null;
Color?color = null;
var pixel = GetPixelNative(hdc, nXPos, nYPos);
var errorCode = NativeApiResult.GetLastError();
if (errorCode == (Int32)LastErrorCode.Normal)
{
// color= Color.FromArgb((Int32)pixel);
color = Color.FromArgb(
// (Int32)(pixel & 0xFF000000) >> 24,
(Int32)(pixel & 0x000000FF),
(Int32)(pixel & 0x0000FF00) >> 8,
(Int32)(pixel & 0x00FF0000) >> 16);
}
else
{
}
result = NativeApiResult.Create(color, pixel, errorCode);
return(result);
}
