Dynamic DLL loading

DllDynamic.c

/*
 * Compile with cl:
 * cl /nologo /EHsc DllDynamic.c
 *
 */
 
#include <Windows.h>

typedef int (WINAPI * ptrMessageBox)(HWND, LPCTSTR, LPCTSTR, UINT);

ptrMessageBox fMessageBox;

int main(int argc, char **argv)
{
	/* Resolve imports */
	HMODULE hUser32 = LoadLibraryA("user32.dll");
	
    fMessageBox = (ptrMessageBox) GetProcAddress(hUser32, "MessageBoxA");
	
	if (NULL == fMessageBox) {
		printf("Error loading function.");
		
		return 1;
	}
			
	fMessageBox(NULL, "A process is loading the DLL", "Title", MB_OK);

	return 0;
}