server: Define an lparam_t type for message parameters that can hold all sorts of data.
diff --git a/server/window.c b/server/window.c
index da97a8e..2fa6164 100644
--- a/server/window.c
+++ b/server/window.c
@@ -83,7 +83,7 @@
unsigned int color_key; /* color key for a layered window */
unsigned int alpha; /* alpha value for a layered window */
unsigned int layered_flags; /* flags for a layered window */
- unsigned long user_data; /* user-specific data */
+ lparam_t user_data; /* user-specific data */
WCHAR *text; /* window caption text */
unsigned int paint_flags; /* various painting flags */
int prop_inuse; /* number of in-use window properties */
