First instance of anything that works

injectable_binary/build.bat

@@ -0,0 +1,4 @@
+@zig cc main.c -o main.exe -Os -nostdlib -nodefaultlibs -luser32
+
+
+

injectable_binary/main.c

@@ -0,0 +1,5 @@
+extern void MessageBoxA(int, char*, char*, int);
+
+void wWinMainCRTStartup() {
+    MessageBoxA(0, "Hello, world!", "Hello, world!", 0);
+}