Add a few missing #includes.

dlls/dpnhpast/main.c

diff --git a/dlls/dpnhpast/main.c b/dlls/dpnhpast/main.c
index 93ba422..69fbb08 100644
--- a/dlls/dpnhpast/main.c
+++ b/dlls/dpnhpast/main.c
@@ -22,6 +22,7 @@
 
 #include "windef.h"
 #include "winbase.h"
+#include "objbase.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(dpnhpast);

dlls/mapi32/imalloc.c

diff --git a/dlls/mapi32/imalloc.c b/dlls/mapi32/imalloc.c
index ffe20ed..1ea9442 100644
--- a/dlls/mapi32/imalloc.c
+++ b/dlls/mapi32/imalloc.c
@@ -31,6 +31,7 @@
 #include "winternl.h"
 #include "objbase.h"
 #include "shlwapi.h"
+#include "mapiutil.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(mapi);

dlls/msisys/msisys.c

diff --git a/dlls/msisys/msisys.c b/dlls/msisys/msisys.c
index 62d1238..dbcb52f 100644
--- a/dlls/msisys/msisys.c
+++ b/dlls/msisys/msisys.c
@@ -27,6 +27,7 @@
 #include "winbase.h"
 #include "wingdi.h"
 #include "winuser.h"
+#include "objbase.h"
 
 #include "wine/debug.h"
 

dlls/netapi32/browsr.c

diff --git a/dlls/netapi32/browsr.c b/dlls/netapi32/browsr.c
index 3cda17e..b0ed893 100644
--- a/dlls/netapi32/browsr.c
+++ b/dlls/netapi32/browsr.c
@@ -25,6 +25,7 @@
 #include "winerror.h"
 #include "lmcons.h"
 #include "lmbrowsr.h"
+#include "lmshare.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(netapi32);

dlls/rsaenh/rsaenh.c

diff --git a/dlls/rsaenh/rsaenh.c b/dlls/rsaenh/rsaenh.c
index 4db2826..2e9b701 100644
--- a/dlls/rsaenh/rsaenh.c
+++ b/dlls/rsaenh/rsaenh.c
@@ -36,6 +36,7 @@
 #include "lmcons.h"
 #include "handle.h"
 #include "implglue.h"
+#include "objbase.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
 
@@ -3632,7 +3633,7 @@
  *       Microsoft Strong Cryptographpic Provider
  *   - HKLM\Software\Microsoft\Cryptography\Defaults\Provider Types\Type 001
  */
-HRESULT WINAPI DllRegisterServer()
+HRESULT WINAPI DllRegisterServer(void)
 {
     HKEY key;
     DWORD dp;
@@ -3709,7 +3710,7 @@
  * NOTES
  *  For the relevant keys see DllRegisterServer.
  */
-HRESULT WINAPI DllUnregisterServer()
+HRESULT WINAPI DllUnregisterServer(void)
 {
     RegDeleteKeyW(HKEY_LOCAL_MACHINE, szProviderKeys[0]);
     RegDeleteKeyW(HKEY_LOCAL_MACHINE, szProviderKeys[1]);

dlls/wintrust/wintrust_main.c

diff --git a/dlls/wintrust/wintrust_main.c b/dlls/wintrust/wintrust_main.c
index 76912b3..30bb992 100644
--- a/dlls/wintrust/wintrust_main.c
+++ b/dlls/wintrust/wintrust_main.c
@@ -26,6 +26,7 @@
 #include "guiddef.h"
 #include "wintrust.h"
 #include "mscat.h"
+#include "objbase.h"
 
 #include "wine/debug.h"