Center titlebar 1.0 (#286)

* Create center-titlebar.wh.cpp

* Update center-titlebar.wh.cpp

mods/center-titlebar.wh.cpp

@@ -0,0 +1,72 @@
+// ==WindhawkMod==
+// @id              center-titlebar
+// @name            Center Titlebar
+// @description     Center align the text in titlebar
+// @version         1.0
+// @author          rounk-ctrl
+// @github          https://github.com/rounk-ctrl
+// @include         dwm.exe
+// ==/WindhawkMod==
+
+// ==WindhawkModReadme==
+/*
+# Center Titlebar
+A port of valinet's [WinCenterTitle](https://github.com/valinet/WinCenterTitle).
+
+![Screenshot](https://i.imgur.com/ULXuIQn.png)
+
+Only has the non-aero path for now.
+
+# ⚠ Important usage note ⚠ 
+  
+ In order to use this mod, you must enable Windhawk to inject into system processes in its advanced settings. 
+ If you do not do this, it will silently fail to inject. **Changing the Windhawk advanced settings will also 
+ affect any other mod you have installed, and may cause instability as any other mod that injects into all 
+ processes will now inject into system processes too.** 
+  
+ This mod will not work on portable versions of Windhawk because DWM is a protected process and can only be 
+ modified by a system account. Since the portable version of Windhawk only runs as administrator under your 
+ own user account, it will not have the privilege required to inject into DWM. (You may not be so lucky with 
+ forcing the portable version to run as `NT AUTHORITY\SYSTEM` either, as this didn't work in my testing.) 
+*/
+// ==/WindhawkModReadme==
+
+#include <Windows.h>
+
+#define ENTIRE_TITLEBAR 10000
+
+// DrawTextW
+using DrawTextW_t = decltype(&DrawTextW);
+DrawTextW_t DrawTextW_Orig;
+int WINAPI DrawTextW_Hook(HDC hdc, LPCWSTR lpchText, int cchText, LPRECT lprc, UINT format)
+{
+    int ret;
+
+    if (!(format & DT_CALCRECT))
+    {
+        // fixes title label sometimes overlapping right margin of window
+        lprc->right -= 2;
+    }
+    ret = DrawTextW_Orig(
+        hdc,
+        lpchText,
+        cchText,
+        lprc,
+        (format & (~DT_LEFT)) | DT_CENTER
+    );
+    if (format & DT_CALCRECT) lprc->right = ENTIRE_TITLEBAR;
+    return ret;
+}
+
+// init
+BOOL Wh_ModInit() {
+    // hook DrawTextW
+    Wh_SetFunctionHook((void*)DrawTextW, (void*)DrawTextW_Hook,
+                       (void**)&DrawTextW_Orig);
+    return TRUE;
+}
+
+// uninit
+void Wh_ModUninit() {
+    Wh_Log(L"Uninit");
+}