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    <p>There is not a platform independent function for this that I know of. IF you plan to target multiple versions of Windows be aware that the implementation differs across some versions. I hit this problem when testing an app under NT 3.51 for instance... (archaic, I know).</p> <p>Here is some code I used for the memory side of things. This doesn't work across platforms other than windows, and will just return 0 when compiled without the WIN32 define:</p> <p>EDIT: I forgot to mention, this code divides and rounds down to the nearest MB, hence the >> 20 all over the place.</p> <pre><code>// get memory info... int getTotalRAM() { int ret = 0; #ifdef WIN32 DWORD v = GetVersion(); DWORD major = (DWORD)(LOBYTE(LOWORD(v))); DWORD minor = (DWORD)(HIBYTE(LOWORD(v))); DWORD build; if (v &lt; 0x80000000) build = (DWORD)(HIWORD(v)); else build = 0; // because compiler static links the function... BOOL (__stdcall*GMSEx)(LPMEMORYSTATUSEX) = 0; HINSTANCE hIL = LoadLibrary(L"kernel32.dll"); GMSEx = (BOOL(__stdcall*)(LPMEMORYSTATUSEX))GetProcAddress(hIL, "GlobalMemoryStatusEx"); if(GMSEx) { MEMORYSTATUSEX m; m.dwLength = sizeof(m); if(GMSEx(&amp;m)) { ret = (int)(m.ullTotalPhys&gt;&gt;20); } } else { MEMORYSTATUS m; m.dwLength = sizeof(m); GlobalMemoryStatus(&amp;m); ret = (int)(m.dwTotalPhys&gt;&gt;20); } #endif return ret; } int getAvailRAM() { int ret = 0; #ifdef WIN32 DWORD v = GetVersion(); DWORD major = (DWORD)(LOBYTE(LOWORD(v))); DWORD minor = (DWORD)(HIBYTE(LOWORD(v))); DWORD build; if (v &lt; 0x80000000) build = (DWORD)(HIWORD(v)); else build = 0; // because compiler static links the function... BOOL (__stdcall*GMSEx)(LPMEMORYSTATUSEX) = 0; HINSTANCE hIL = LoadLibrary(L"kernel32.dll"); GMSEx = (BOOL(__stdcall*)(LPMEMORYSTATUSEX))GetProcAddress(hIL, "GlobalMemoryStatusEx"); if(GMSEx) { MEMORYSTATUSEX m; m.dwLength = sizeof(m); if(GMSEx(&amp;m)) { ret = (int)(m.ullAvailPhys&gt;&gt;20); } } else { MEMORYSTATUS m; m.dwLength = sizeof(m); GlobalMemoryStatus(&amp;m); ret = (int)(m.dwAvailPhys&gt;&gt;20); } #endif return ret; } int getTotalMemory() { int ret = 0; #ifdef WIN32 DWORD v = GetVersion(); DWORD major = (DWORD)(LOBYTE(LOWORD(v))); DWORD minor = (DWORD)(HIBYTE(LOWORD(v))); DWORD build; if (v &lt; 0x80000000) build = (DWORD)(HIWORD(v)); else build = 0; // because compiler static links the function... BOOL (__stdcall*GMSEx)(LPMEMORYSTATUSEX) = 0; HINSTANCE hIL = LoadLibrary(L"kernel32.dll"); GMSEx = (BOOL(__stdcall*)(LPMEMORYSTATUSEX))GetProcAddress(hIL, "GlobalMemoryStatusEx"); if(GMSEx) { MEMORYSTATUSEX m; m.dwLength = sizeof(m); if(GMSEx(&amp;m)) { ret = (int)(m.ullTotalPhys&gt;&gt;20) + (int)(m.ullTotalVirtual&gt;&gt;20); } } else { MEMORYSTATUS m; m.dwLength = sizeof(m); GlobalMemoryStatus(&amp;m); ret = (int)(m.dwTotalPhys&gt;&gt;20) + (int)(m.dwTotalVirtual&gt;&gt;20); } #endif return ret; } int getAvailMemory() { int ret = 0; #ifdef WIN32 DWORD v = GetVersion(); DWORD major = (DWORD)(LOBYTE(LOWORD(v))); DWORD minor = (DWORD)(HIBYTE(LOWORD(v))); DWORD build; if (v &lt; 0x80000000) build = (DWORD)(HIWORD(v)); else build = 0; // because compiler static links the function... BOOL (__stdcall*GMSEx)(LPMEMORYSTATUSEX) = 0; HINSTANCE hIL = LoadLibrary(L"kernel32.dll"); GMSEx = (BOOL(__stdcall*)(LPMEMORYSTATUSEX))GetProcAddress(hIL, "GlobalMemoryStatusEx"); if(GMSEx) { MEMORYSTATUSEX m; m.dwLength = sizeof(m); if(GMSEx(&amp;m)) { ret = (int)(m.ullAvailPhys&gt;&gt;20) + (int)(m.ullAvailVirtual&gt;&gt;20); } } else { MEMORYSTATUS m; m.dwLength = sizeof(m); GlobalMemoryStatus(&amp;m); ret = (int)(m.dwAvailPhys&gt;&gt;20) + (int)(m.dwAvailVirtual&gt;&gt;20); } #endif return ret; } </code></pre>
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