Works in 32-bit W7 but not in 64-bit W8.1

Question

Hello!
I have defined few hot keys (for to set the dialog position and to adjust transparency) in DlgProc():
RegisterHotKey(hDlg, 0, MOD_SHIFT | MOD_CONTROL | MOD_NOREPEAT, VK_DOWN);
RegisterHotKey(hDlg, 1, MOD_SHIFT | MOD_CONTROL | MOD_NOREPEAT, VK_UP);
RegisterHotKey(hDlg, 2, MOD_SHIFT | MOD_ALT, VK_DOWN);
RegisterHotKey(hDlg, 3, MOD_SHIFT | MOD_ALT, VK_UP);
RegisterHotKey(hDlg, 4, MOD_SHIFT | MOD_ALT, VK_LEFT);
RegisterHotKey(hDlg, 5, MOD_SHIFT | MOD_ALT, VK_RIGHT);
RegisterHotKey(hDlg, 6, MOD_SHIFT | MOD_ALT | MOD_NOREPEAT, VK_END);
RegisterHotKey(hDlg, 7, MOD_SHIFT | MOD_ALT | MOD_NOREPEAT, VK_HOME);
which are handled through switch() construction (placed in DlgProc()):
switch (message){
case WM_INITDIALOG:
loadDefaults();
SetWindowLongPtr(hDlg, GWL_STYLE, WS_POPUP);
layeredDlg(hDlg);
... break;
case WM_HOTKEY: // transparency and dialog position updPos = true;
switch (wParam){
case 0: // SHIFT+CTRL+VK_DOWN
if (transparency < 100){
transparency += 5;
updPos = false;
break;
case 1: // SHIFT+CTRL+VK_UP
if (transparency > 10){
transparency -= 5;
updPos = false;
break;
case 2: // SHIFT+ALT+VK_DOWN
WyPos++;
break;
case 3: // SHIFT+ALT+VK_UP
WyPos--;
break;
case 4: // SHIFT+ALT+VK_LEFT
WxPos--;
break;
case 5: // SHIFT+ALT+VK_RIGHT
WxPos++;
break;
case 6: // SHIFT+ALT+VK_END
RECT desktop;
GetWindowRect(hDesktop, &desktop);
WxPos = desktop.right - 260;
hr = pMeterInfo->GetMeteringChannelCount(&channelCount);
WyPos = desktop.bottom - ((int)channelCount * 10 + 50);
break;
case 7: // SHIFT+ALT+VK_HOME
WxPos = 0;
WyPos = 0;
break;
if (updPos){
restoreVisibilityMode(hDlg);
layeredDlg(hDlg);
break;
and called methods are these:
void restoreVisibilityMode(HWND hDlg){
if (TOPMOST){
SetWindowPos(hDlg, HWND_TOPMOST, WxPos, WyPos, 0, 0, SWP_NOSIZE);
else{
SetWindowPos(hDlg, HWND_NOTOPMOST, WxPos, WyPos, 0, 0, SWP_NOSIZE);
void layeredDlg(HWND hDlg){
SetWindowLongPtr(hDlg, GWL_EXSTYLE, GetWindowLongPtr(hDlg, GWL_EXSTYLE) | WS_EX_LAYERED | WS_POPUP);
SetLayeredWindowAttributes(hDlg, 0, (255 * transparency) / 100, LWA_ALPHA);
As no Windows 8.x nor 64-bit OS available ATM, I can't check/debug this issue (reported on some forum) by myself --> so, is there some difference in handling hotkeys and/or window functionality between either W7
and W8.x or 32-bit and 64-bit OS?
I'm developing using VC++ 2013.4 in W7 32-bit. Any suggestions welcome?

Answer 1

As no Windows 8.x nor 64-bit OS available ATM, I can't check/debug this issue (reported on some forum) by myself --> so, is there some difference in handling hotkeys and/or window functionality between either W7
and W8.x or 32-bit and 64-bit OS?
VC++ 2013.4 in use. Any suggestions welcome?
You need to debug it in the target OS. Use Hyper-V, VirtualBox, or some other virtual environment and install the target OS. These have trial periods, so you aren't out any money.