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Created Jul 21, 2017
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Dynamic DLL loading
* 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;
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