Step 1:到GTK官方网站上下载安装包。有32位的和64位，64位的有这句：
Note that these 64-bit packages are experimental. Binary compatibility between versions is not guaranteed.
还是选择下载的32位的。选择all-in-one bundle，所有的依赖包都在这里。
Step 2：解压到指定目录下。
解压的路径是：I:\Program Files (x86)\GTK，其中GTK文件夹自己创建，为避免万一，尽量保证文件夹不要有空格。
step 3:添加环境变量
编辑Windows环境变量：计算机--属性--高级系统设置--环境变量。在Path后加上：I:\Program Files (x86)\GTK即可。
step 4:配置GTK+
C:\Users\Administrator>pkg-config --cflags gtk+-3.0
结果为：
-mms-bitfields -II:/Program\ Files\ (x86)/GTK/include/gtk-3.0 -II:/Program\ File s\ (x86)/GTK/include/cairo -II:/Program\ Files\ (x86)/GTK/include/pango-1.0 -II: /Program\ Files\ (x86)/GTK/include/atk-1.0 -II:/Program\ Files\ (x86)/GTK/includ e/cairo -II:/Program\ Files\ (x86)/GTK/include/pixman-1 -II:/Program\ Files\ (x8 6)/GTK/include -II:/Program\ Files\ (x86)/GTK/include/freetype2 -II:/Program\ Fi les\ (x86)/GTK/include -II:/Program\ Files\ (x86)/GTK/include/libpng15 -II:/Prog ram\ Files\ (x86)/GTK/include/gdk-pixbuf-2.0 -II:/Program\ Files\ (x86)/GTK/incl ude/libpng15 -II:/Program\ Files\ (x86)/GTK/include/glib-2.0 -II:/Program\ Files \ (x86)/GTK/lib/glib-2.0/include
step 5:验证安装
C:\Users\Administrator>gtk3-demo
若出现GTK+ Code Demos则说明安装OK。