diff --git a/reactos/dll/cpl/access/display.c b/reactos/dll/cpl/access/display.c
index d4b6279550f..7d75522cf23 100644
--- a/reactos/dll/cpl/access/display.c
+++ b/reactos/dll/cpl/access/display.c
@@ -255,7 +255,7 @@ DisplayPageProc(HWND hwndDlg,
                 SetCaretBlinkTime(pGlobalData->uCaretBlinkTime);
                 SystemParametersInfo(SPI_SETCARETWIDTH,
                                      0,
-                                     (PVOID)pGlobalData->uCaretWidth,
+                                     IntToPtr(pGlobalData->uCaretWidth),
                                      SPIF_UPDATEINIFILE | SPIF_SENDCHANGE /*0*/);
                 SystemParametersInfo(SPI_SETHIGHCONTRAST,
                                      sizeof(HIGHCONTRAST),
diff --git a/reactos/dll/cpl/console/console.c b/reactos/dll/cpl/console/console.c
index 801a0d35c3c..638c79284a9 100644
--- a/reactos/dll/cpl/console/console.c
+++ b/reactos/dll/cpl/console/console.c
@@ -12,7 +12,7 @@
 #define WM_SETCONSOLE (WM_USER+10)
 
 
-LONG APIENTRY InitApplet(HWND hwnd, UINT uMsg, LONG wParam, LONG lParam);
+LONG APIENTRY InitApplet(HWND hwnd, UINT uMsg, LPARAM wParam, LPARAM lParam);
 INT_PTR CALLBACK OptionsProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
 INT_PTR CALLBACK FontProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
 INT_PTR CALLBACK LayoutProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
diff --git a/reactos/dll/cpl/main/mouse.c b/reactos/dll/cpl/main/mouse.c
index ff3cc71f890..24423937986 100644
--- a/reactos/dll/cpl/main/mouse.c
+++ b/reactos/dll/cpl/main/mouse.c
@@ -1257,7 +1257,7 @@ PointerProc(IN HWND hwndDlg,
 //#if (WINVER >= 0x0500)
                 if (pPointerData->bOrigDropShadow != pPointerData->bDropShadow)
                 {
-                    SystemParametersInfo(SPI_SETDROPSHADOW, 0, (PVOID)pPointerData->bDropShadow, SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
+                    SystemParametersInfo(SPI_SETDROPSHADOW, 0, IntToPtr(pPointerData->bDropShadow), SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
                     pPointerData->bOrigDropShadow = pPointerData->bDropShadow;
                 }
 //#endif
@@ -1266,7 +1266,7 @@ PointerProc(IN HWND hwndDlg,
             else if (lppsn->hdr.code == PSN_RESET)
             {
 //#if (WINVER >= 0x0500)
-                SystemParametersInfo(SPI_SETDROPSHADOW, 0, (PVOID)pPointerData->bOrigDropShadow, 0);
+                SystemParametersInfo(SPI_SETDROPSHADOW, 0, IntToPtr(pPointerData->bOrigDropShadow), 0);
 //#endif
             }
             break;
@@ -1365,7 +1365,7 @@ PointerProc(IN HWND hwndDlg,
                         SendMessage((HWND)lParam, BM_SETCHECK, (WPARAM)BST_CHECKED, (LPARAM)0);
                     }
 //#if (WINVER >= 0x0500)
-                    SystemParametersInfo(SPI_SETDROPSHADOW, 0, (PVOID)pPointerData->bDropShadow, 0);
+                    SystemParametersInfo(SPI_SETDROPSHADOW, 0, IntToPtr(pPointerData->bDropShadow), 0);
 //#endif
                     PropSheet_Changed(GetParent(hwndDlg), hwndDlg);
                     break;
@@ -1549,7 +1549,7 @@ OptionProc(IN HWND hwndDlg,
                         pOptionData->bMouseVanish = TRUE;
                         SendMessage((HWND)lParam, BM_SETCHECK, (WPARAM)BST_CHECKED, (LPARAM)0);
                     }
-                    SystemParametersInfo(SPI_SETMOUSEVANISH, 0, (PVOID)pOptionData->bMouseVanish, 0);
+                    SystemParametersInfo(SPI_SETMOUSEVANISH, 0, IntToPtr(pOptionData->bMouseVanish), 0);
                     break;
 
                 case IDC_CHECK_SHOW_POINTER:
@@ -1563,7 +1563,7 @@ OptionProc(IN HWND hwndDlg,
                         pOptionData->bMouseSonar = TRUE;
                         SendMessage((HWND)lParam, BM_SETCHECK, (WPARAM)BST_CHECKED, (LPARAM)0);
                     }
-                    SystemParametersInfo(SPI_SETMOUSESONAR, 0, (PVOID)pOptionData->bMouseSonar, 0);
+                    SystemParametersInfo(SPI_SETMOUSESONAR, 0, IntToPtr(pOptionData->bMouseSonar), 0);
                     break;
 
             }
@@ -1577,7 +1577,7 @@ OptionProc(IN HWND hwndDlg,
                 /* Set mouse speed */
                 if (pOptionData->ulOrigMouseSpeed != pOptionData->ulMouseSpeed)
                 {
-                    SystemParametersInfo(SPI_SETMOUSESPEED, 0, (PVOID)pOptionData->ulMouseSpeed, SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
+                    SystemParametersInfo(SPI_SETMOUSESPEED, 0, IntToPtr(pOptionData->ulMouseSpeed), SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
                     pOptionData->ulOrigMouseSpeed = pOptionData->ulMouseSpeed;
                 }
 
@@ -1607,14 +1607,14 @@ OptionProc(IN HWND hwndDlg,
                 /* hide pointer while typing */
                 if (pOptionData->bOrigMouseVanish != pOptionData->bMouseVanish)
                 {
-                    SystemParametersInfo(SPI_SETMOUSEVANISH, 0, (PVOID)pOptionData->bMouseVanish, SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
+                    SystemParametersInfo(SPI_SETMOUSEVANISH, 0, IntToPtr(pOptionData->bMouseVanish), SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
                     pOptionData->bOrigMouseVanish = pOptionData->bMouseVanish;
                 }
 
                 /* show pointer with Ctrl-Key */
                 if (pOptionData->bOrigMouseSonar != pOptionData->bMouseSonar)
                 {
-                    SystemParametersInfo(SPI_SETMOUSESONAR, 0, (PVOID)pOptionData->bMouseSonar, SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
+                    SystemParametersInfo(SPI_SETMOUSESONAR, 0, IntToPtr(pOptionData->bMouseSonar), SPIF_SENDCHANGE | SPIF_UPDATEINIFILE);
                     pOptionData->bOrigMouseSonar = pOptionData->bMouseSonar;
                 }
                 return TRUE;
@@ -1622,12 +1622,12 @@ OptionProc(IN HWND hwndDlg,
             else if (lppsn->hdr.code == PSN_RESET)
             {
                 /* Set the original mouse speed */
-                SystemParametersInfo(SPI_SETMOUSESPEED, 0, (PVOID)pOptionData->ulOrigMouseSpeed, 0);
+                SystemParametersInfo(SPI_SETMOUSESPEED, 0, IntToPtr(pOptionData->ulOrigMouseSpeed), 0);
                 SystemParametersInfo(SPI_SETMOUSE, 0, &pOptionData->OrigMouseAccel, 0);
                 SystemParametersInfo(SPI_SETSNAPTODEFBUTTON, (UINT)pOptionData->bOrigSnapToDefaultButton, 0, 0);
                 SystemParametersInfo(SPI_SETMOUSETRAILS, pOptionData->uOrigMouseTrails, 0, 0);
-                SystemParametersInfo(SPI_SETMOUSEVANISH, 0, (PVOID)pOptionData->bOrigMouseVanish, 0);
-                SystemParametersInfo(SPI_SETMOUSESONAR, 0, (PVOID)pOptionData->bOrigMouseSonar, 0);
+                SystemParametersInfo(SPI_SETMOUSEVANISH, 0, IntToPtr(pOptionData->bOrigMouseVanish), 0);
+                SystemParametersInfo(SPI_SETMOUSESONAR, 0,IntToPtr(pOptionData->bOrigMouseSonar), 0);
             }
             break;
 
@@ -1644,7 +1644,7 @@ OptionProc(IN HWND hwndDlg,
                     case TB_BOTTOM:
                     case TB_ENDTRACK:
                         pOptionData->ulMouseSpeed = (ULONG)SendDlgItemMessage(hwndDlg, IDC_SLIDER_MOUSE_SPEED, TBM_GETPOS, 0, 0) + 1;
-                        SystemParametersInfo(SPI_SETMOUSESPEED, 0, (PVOID)pOptionData->ulMouseSpeed, SPIF_SENDCHANGE);
+                        SystemParametersInfo(SPI_SETMOUSESPEED, 0, IntToPtr(pOptionData->ulMouseSpeed), SPIF_SENDCHANGE);
                         PropSheet_Changed(GetParent(hwndDlg), hwndDlg);
                         break;
 #if 0
diff --git a/reactos/dll/cpl/mmsys/audio.c b/reactos/dll/cpl/mmsys/audio.c
index 5dd7bb07e7f..778d3dc5d4c 100644
--- a/reactos/dll/cpl/mmsys/audio.c
+++ b/reactos/dll/cpl/mmsys/audio.c
@@ -107,7 +107,7 @@ GetDevNum(HWND hControl, DWORD Id)
     if (DevNum == (UINT) CB_ERR)
         return 0;
 
-    if (mixerGetID((HMIXEROBJ) DevNum, &DevNum, Id) != MMSYSERR_NOERROR)
+    if (mixerGetID((HMIXEROBJ)IntToPtr(DevNum), &DevNum, Id) != MMSYSERR_NOERROR)
         return 0;
 
     return DevNum;
diff --git a/reactos/dll/cpl/mmsys/volume.c b/reactos/dll/cpl/mmsys/volume.c
index e0db2673c3e..7017e9983a3 100644
--- a/reactos/dll/cpl/mmsys/volume.c
+++ b/reactos/dll/cpl/mmsys/volume.c
@@ -237,14 +237,14 @@ InitVolumeControls(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
         return;
     }
 
-    if (mixerOpen(&pGlobalData->hMixer, 0, (DWORD)hwndDlg, 0, MIXER_OBJECTF_MIXER | CALLBACK_WINDOW) != MMSYSERR_NOERROR)
+    if (mixerOpen(&pGlobalData->hMixer, 0, PtrToUlong(hwndDlg), 0, MIXER_OBJECTF_MIXER | CALLBACK_WINDOW) != MMSYSERR_NOERROR)
     {
         MessageBox(hwndDlg, _T("Cannot open mixer"), NULL, MB_OK);
         return;
     }
 
     ZeroMemory(&mxc, sizeof(MIXERCAPS));
-    if (mixerGetDevCaps((UINT)pGlobalData->hMixer, &mxc, sizeof(MIXERCAPS)) != MMSYSERR_NOERROR)
+    if (mixerGetDevCaps(PtrToUint(pGlobalData->hMixer), &mxc, sizeof(MIXERCAPS)) != MMSYSERR_NOERROR)
     {
         MessageBox(hwndDlg, _T("mixerGetDevCaps failed"), NULL, MB_OK);
         return;
@@ -278,7 +278,7 @@ InitVolumeControls(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
 VOID
 LaunchSoundControl(HWND hwndDlg)
 {
-    if ((INT)ShellExecuteW(NULL, L"open", L"sndvol32.exe", NULL, NULL, SW_SHOWNORMAL) > 32)
+    if ((INT_PTR)ShellExecuteW(NULL, L"open", L"sndvol32.exe", NULL, NULL, SW_SHOWNORMAL) > 32)
         return;
     MessageBox(hwndDlg, _T("Cannot run sndvol32.exe"), NULL, MB_OK);
 }
diff --git a/reactos/dll/cpl/ncpa/ncpa.c b/reactos/dll/cpl/ncpa/ncpa.c
index 1af077d6844..5019e07f9a1 100644
--- a/reactos/dll/cpl/ncpa/ncpa.c
+++ b/reactos/dll/cpl/ncpa/ncpa.c
@@ -25,7 +25,7 @@ DisplayApplet(VOID)
 
 	wcscpy(szParameters, L"/n,::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{7007ACC7-3202-11D1-AAD2-00805FC1270E}");
 
-	return (int) ShellExecuteW(NULL, L"open", L"explorer.exe", szParameters, NULL, SW_SHOWDEFAULT) > 32;
+	return (INT_PTR) ShellExecuteW(NULL, L"open", L"explorer.exe", szParameters, NULL, SW_SHOWDEFAULT) > 32;
 }
 
 /* Control Panel Callback */
diff --git a/reactos/dll/cpl/sysdm/hardware.c b/reactos/dll/cpl/sysdm/hardware.c
index 16701fd2f83..4b919bb9d4a 100644
--- a/reactos/dll/cpl/sysdm/hardware.c
+++ b/reactos/dll/cpl/sysdm/hardware.c
@@ -17,7 +17,7 @@ LaunchDeviceManager(HWND hWndParent)
 {
 /* hack for ROS to start our devmgmt until we have mmc */
 #ifdef __REACTOS__
-    return ((INT)ShellExecuteW(NULL, L"open", L"devmgmt.exe", NULL, NULL, SW_SHOWNORMAL) > 32);
+    return ((INT_PTR)ShellExecuteW(NULL, L"open", L"devmgmt.exe", NULL, NULL, SW_SHOWNORMAL) > 32);
 #else
     HMODULE hDll;
     PDEVMGREXEC DevMgrExec;
diff --git a/reactos/dll/cpl/sysdm/startrec.c b/reactos/dll/cpl/sysdm/startrec.c
index 994cfccf571..69e87e9edd0 100644
--- a/reactos/dll/cpl/sysdm/startrec.c
+++ b/reactos/dll/cpl/sysdm/startrec.c
@@ -437,7 +437,7 @@ DeleteBootRecords(HWND hwndDlg)
     for (index = 0; index <lIndex; index++)
     {
         pRecord = (PBOOTRECORD) SendDlgItemMessageW(hwndDlg, IDC_STRECOSCOMBO, CB_GETITEMDATA, (WPARAM)index, (LPARAM)0);
-        if ((INT)pRecord != CB_ERR)
+        if ((INT_PTR)pRecord != CB_ERR)
         {
             HeapFree(GetProcessHeap(), 0, pRecord);
         }
@@ -713,7 +713,7 @@ StartRecDlgProc(HWND hwndDlg,
 
                     pRecord = (PBOOTRECORD) SendDlgItemMessage(hwndDlg, IDC_STRECOSCOMBO, CB_GETITEMDATA, (WPARAM)lResult, (LPARAM)0);
 
-                    if ((INT)pRecord != CB_ERR)
+                    if ((INT_PTR)pRecord != CB_ERR)
                     {
                         if (pStartInfo->iFreeLdrIni == 1) // FreeLdrIni style
                         {