Use immersive dark mode on game window (PR #3903, Fixes #3859)

Author: FileEX

Client/core/DXHook/CProxyDirect3D9.cpp

@@ -10,6 +10,8 @@
  *****************************************************************************/
 
 #include "StdInc.h"
+#include <dwmapi.h>
+
 HRESULT HandleCreateDeviceResult(HRESULT hResult, IDirect3D9* pDirect3D, UINT Adapter, D3DDEVTYPE DeviceType, HWND hFocusWindow, DWORD BehaviorFlags,
                                  D3DPRESENT_PARAMETERS* pPresentationParameters, IDirect3DDevice9** ppReturnedDeviceInterface);
 std::vector<IDirect3D9*> ms_CreatedDirect3D9List;
@@ -166,6 +168,10 @@ HRESULT CProxyDirect3D9::CreateDevice(UINT Adapter, D3DDEVTYPE DeviceType, HWND
     SetWindowTextW(hFocusWindow, MbUTF8ToUTF16("MTA: San Andreas").c_str());
     #endif
 
+    // Set dark titlebar if needed
+    BOOL darkTitleBar = GetSystemRegistryValue((uint)HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize", "AppsUseLightTheme") == "\x0";
+    DwmSetWindowAttribute(hFocusWindow, DWMWA_USE_IMMERSIVE_DARK_MODE, &darkTitleBar, sizeof(darkTitleBar));
+
     // Detect if second call to CreateDevice
     if (CreateDeviceSecondCallCheck(hResult, m_pDevice, Adapter, DeviceType, hFocusWindow, BehaviorFlags, pPresentationParameters, ppReturnedDeviceInterface))
     {

Client/core/premake5.lua

@@ -46,7 +46,7 @@ project "Client Core"
 
 	links {
 		"ws2_32", "d3dx9", "Userenv", "DbgHelp", "xinput", "Imagehlp", "dxguid", "dinput8",
-		"strmiids",	"odbc32", "odbccp32", "shlwapi", "winmm", "gdi32", "Imm32", "Psapi",
+		"strmiids",	"odbc32", "odbccp32", "shlwapi", "winmm", "gdi32", "Imm32", "Psapi", "dwmapi",
 		"pthread", "libpng", "jpeg", "zlib", "tinygettext", "discord-rpc",
 	}