loadvulkan.c

HMODULE  vulkanLib = LoadLibrary("vulkan-1.dll");

if(vulkanLib == null) //no vulkan installed error out
    exit(1);

PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr) GetProcAddress(vulkanLib, "vkGetInstanceProcAddr");
PFN_vkCreateInstance vkCreateInstance = (FPN_vkCreateInstance) vkGetInstanceProcAddr(null, "vkCreateInstance");

VkInstance instance;
VkResult result = vkCreateInstance(..., null, &instance);
if( result!= VK_SUCCESS)  //no vulkan installed error out
    exit(1);

//load the remaining function pointers using vkGetInstanceProcAddr(instace, "...");