NCHITTEST

INT WINAPI NCHITTEST(HWND hWnd, LPARAM lParam)
{
    int iSide = 0; int iTopBot = 0; int cur = 0;
    int Set = 0x10003; int bMarg = 6; int HT = 2;
    WINDOWPLACEMENT wlcmt; POINT curPos;
    GetWindowPlacement(hWnd, &wlcmt);
    GetCursorPos(&curPos);
    ScreenToClient(hWnd, &curPos);
    if (curPos.x < bMarg) { iSide = 1; };
    if (curPos.x > (wlcmt.rcNormalPosition.right - bMarg)) { iSide = 2; };
    if (curPos.y < bMarg) { iTopBot = 3; };
    if (curPos.y > (wlcmt.rcNormalPosition.bottom -  bMarg)) { iTopBot = 6; };
    cur = iSide + iTopBot;
    if (wlcmt.showCmd != 3)
    {
        switch(cur) {
            case 1: { Set = 0x10010; HT = 10; }
            case 2: { Set = 0x10010; HT = 11; }
            case 3: { Set = 0x10013; HT = 12; }
            case 4: {
                Set = 0x1000D;
                HT = 13;
            }
            case 5: {
                Set = 0x1000F;
                HT = 14;
            }
            case 6: {
                Set = 0x10013;
                HT = 15;
            }
            case 7: {
                Set = 0x1000F;
                HT = 16;
            }
            case 8: {
                Set = 0x1000D;
                HT = 17;
            }
        if (HT != 2) return HT;
    }
    if ((abs((lParam >> 16) & 0xFFFF) - wlcmt.rcNormalPosition.top) < 30) return 2;
    SetClassLong(hWnd, -12, Set);
    return 1;
}