public static bool SetHighDpiMode(HighDpiMode highDpiMode)
{
int dpiFlag;
switch (highDpiMode)
{
case HighDpiMode.SystemAware:
dpiFlag = DPI_AWARENESS_CONTEXT_SYSTEM_AWARE;
break;
case HighDpiMode.PerMonitor:
dpiFlag = DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE;
break;
case HighDpiMode.PerMonitorV2:
dpiFlag = DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2;
break;
default:
dpiFlag = DPI_AWARENESS_CONTEXT_UNAWARE;
break;
}
try
{
if (!SetProcessDpiAwarenessContext(dpiFlag))
{
return(false);
}
}
catch (Exception)
{
// We may be on 7 or 8, we just go for SystemAware or DpiUnaware.
switch (highDpiMode)
{
case HighDpiMode.SystemAware:
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
if (!SetProcessDPIAware())
{
return(false);
}
break;
}
}
return(true);
}
/// <summary>
/// Sets the DPI awareness. If not available on the current OS, it falls back to the next possible.
/// </summary>
/// <returns>true/false - If the process DPI awareness is successfully set, returns true. Otherwise false.</returns>
internal static bool SetWinformsApplicationDpiAwareness(HighDpiMode highDpiMode)
{
CAPS.PROCESS_DPI_AWARENESS dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNINITIALIZED;
if (OsVersion.IsWindows10_1703OrGreater)
{
// SetProcessDpiAwarenessContext needs Windows 10 RS2 and above
int rs2AndAboveDpiFlag;
switch (highDpiMode)
{
case HighDpiMode.SystemAware:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE;
break;
case HighDpiMode.PerMonitor:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE;
break;
case HighDpiMode.PerMonitorV2:
// Necessary for RS1, since this SetProcessDpiAwarenessContext IS available here.
rs2AndAboveDpiFlag = SafeNativeMethods.IsValidDpiAwarenessContext(CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) ?
CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 :
CAPS.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE;
break;
case HighDpiMode.DpiUnawareGdiScaled:
// Let's make sure, we do not try to set a value which has been introduced in later Windows releases.
rs2AndAboveDpiFlag = SafeNativeMethods.IsValidDpiAwarenessContext(CAPS.DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED) ?
CAPS.DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED :
CAPS.DPI_AWARENESS_CONTEXT_UNAWARE;
break;
default:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_UNAWARE;
break;
}
return(SafeNativeMethods.SetProcessDpiAwarenessContext(rs2AndAboveDpiFlag));
}
else if (OsVersion.IsWindows8_1OrGreater)
{
// 8.1 introduced SetProcessDpiAwareness
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNAWARE;
break;
case HighDpiMode.SystemAware:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_PER_MONITOR_DPI_AWARE;
break;
default:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
}
return(SafeNativeMethods.SetProcessDpiAwareness(dpiFlag) == CAPS.S_OK);
}
else
{
// Vista or higher has SetProcessDPIAware
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
// We can return, there is nothing to set if we assume we're already in DpiUnaware.
return(true);
case HighDpiMode.SystemAware:
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
}
if (dpiFlag == CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE)
{
return(SafeNativeMethods.SetProcessDPIAware());
}
}
return(false);
}
/// <summary>
/// Sets the DPI awareness. If not available on the current OS, it falls back to the next possible.
/// </summary>
/// <returns>true/false - If the process DPI awareness is successfully set, returns true. Otherwise false.</returns>
internal static bool SetWinformsApplicationDpiAwareness(HighDpiMode highDpiMode)
{
if (OsVersion.IsWindows10_1703OrGreater)
{
// SetProcessDpiAwarenessContext needs Windows 10 RS2 and above
IntPtr rs2AndAboveDpiFlag;
switch (highDpiMode)
{
case HighDpiMode.SystemAware:
rs2AndAboveDpiFlag = User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE;
break;
case HighDpiMode.PerMonitor:
rs2AndAboveDpiFlag = User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE;
break;
case HighDpiMode.PerMonitorV2:
// Necessary for RS1, since this SetProcessDpiAwarenessContext IS available here.
rs2AndAboveDpiFlag = User32.IsValidDpiAwarenessContext(User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE_V2).IsTrue() ?
User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE_V2 :
User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE;
break;
case HighDpiMode.DpiUnawareGdiScaled:
// Let's make sure, we do not try to set a value which has been introduced in later Windows releases.
rs2AndAboveDpiFlag = User32.IsValidDpiAwarenessContext(User32.DPI_AWARENESS_CONTEXT.UNAWARE_GDISCALED).IsTrue() ?
User32.DPI_AWARENESS_CONTEXT.UNAWARE_GDISCALED :
User32.DPI_AWARENESS_CONTEXT.UNAWARE;
break;
default:
rs2AndAboveDpiFlag = User32.DPI_AWARENESS_CONTEXT.UNAWARE;
break;
}
return(User32.SetProcessDpiAwarenessContext(rs2AndAboveDpiFlag).IsTrue());
}
else if (OsVersion.IsWindows8_1OrGreater)
{
// 8.1 introduced SetProcessDpiAwareness
SHCore.PROCESS_DPI_AWARENESS dpiFlag;
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
dpiFlag = SHCore.PROCESS_DPI_AWARENESS.UNAWARE;
break;
case HighDpiMode.SystemAware:
dpiFlag = SHCore.PROCESS_DPI_AWARENESS.SYSTEM_AWARE;
break;
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = SHCore.PROCESS_DPI_AWARENESS.PER_MONITOR_AWARE;
break;
default:
dpiFlag = SHCore.PROCESS_DPI_AWARENESS.SYSTEM_AWARE;
break;
}
return(SHCore.SetProcessDpiAwareness(dpiFlag) == HRESULT.S_OK);
}
else
{
// Vista or higher has SetProcessDPIAware
SHCore.PROCESS_DPI_AWARENESS dpiFlag = (SHCore.PROCESS_DPI_AWARENESS)(-1);
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
// We can return, there is nothing to set if we assume we're already in DpiUnaware.
return(true);
case HighDpiMode.SystemAware:
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = SHCore.PROCESS_DPI_AWARENESS.SYSTEM_AWARE;
break;
}
if (dpiFlag == SHCore.PROCESS_DPI_AWARENESS.SYSTEM_AWARE)
{
return(User32.SetProcessDPIAware().IsTrue());
}
}
return(false);
}
/// <summary>
/// Sets the DPI awareness. If not available on the current OS, it falls back to the next possible.
/// </summary>
/// <returns>true/false - If the process DPI awareness is successfully set, returns true. Otherwise false.</returns>
internal static bool SetWinformsApplicationDpiAwareness(HighDpiMode highDpiMode)
{
CAPS.PROCESS_DPI_AWARENESS dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNINITIALIZED;
// For Windows 10 RS2 and above
if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(SafeNativeMethods.SetProcessDpiAwarenessContext)))
{
int rs2AndAboveDpiFlag;
switch (highDpiMode)
{
case HighDpiMode.SystemAware:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE;
break;
case HighDpiMode.PerMonitor:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE;
break;
case HighDpiMode.PerMonitorV2:
// Necessary for RS1, since this SetProcessDpiAwarenessContext IS available here.
rs2AndAboveDpiFlag = SafeNativeMethods.IsValidDpiAwarenessContext(CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) ?
CAPS.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 :
CAPS.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE;
break;
case HighDpiMode.DpiUnawareGdiScaled:
// Let's make sure, we do not try to set a value which has been introduced in later Windows releases.
rs2AndAboveDpiFlag = SafeNativeMethods.IsValidDpiAwarenessContext(CAPS.DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED) ?
CAPS.DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED :
CAPS.DPI_AWARENESS_CONTEXT_UNAWARE;
break;
default:
rs2AndAboveDpiFlag = CAPS.DPI_AWARENESS_CONTEXT_UNAWARE;
break;
}
return(SafeNativeMethods.SetProcessDpiAwarenessContext(rs2AndAboveDpiFlag));
}
// For operating systems Windows 8.1 to Windows 10 RS1 version.
else if (ApiHelper.IsApiAvailable(ExternDll.ShCore, nameof(SafeNativeMethods.SetProcessDpiAwareness)))
{
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNAWARE;
break;
case HighDpiMode.SystemAware:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_PER_MONITOR_DPI_AWARE;
break;
default:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
}
return(SafeNativeMethods.SetProcessDpiAwareness(dpiFlag) == CAPS.S_OK);
}
// For operating systems windows 7 to windows 8
else if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(SafeNativeMethods.SetProcessDPIAware)))
{
switch (highDpiMode)
{
case HighDpiMode.DpiUnaware:
case HighDpiMode.DpiUnawareGdiScaled:
// We can return, there is nothing to set if we assume we're already in DpiUnaware.
return(true);
case HighDpiMode.SystemAware:
case HighDpiMode.PerMonitor:
case HighDpiMode.PerMonitorV2:
dpiFlag = CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE;
break;
}
if (dpiFlag == CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE)
{
return(SafeNativeMethods.SetProcessDPIAware());
}
}
return(false);
}
private static bool TryReadHighDpiMode(AnalyzerConfigOptionsProvider configOptions, out HighDpiMode highDpiMode, out Diagnostic?diagnostic) => (bool)s_static.TryReadHighDpiMode(configOptions, out highDpiMode, out diagnostic);
public void Application_SetHighDpiMode_SetInvalidValue_ThrowsInvalidEnumArgumentException(HighDpiMode value)
{
Assert.Throws <InvalidEnumArgumentException>("highDpiMode", () => Application.SetHighDpiMode(value));
}
