diff --git a/src/dialog/colorpicker.c b/src/dialog/colorpicker.c
index daed680..a61e121 100644
--- a/src/dialog/colorpicker.c
+++ b/src/dialog/colorpicker.c
@@ -345,14 +345,19 @@ MwWidget MwColorPicker(MwWidget handle, const char* title) {
 	MwSizeHints	sh;
 	int		ww = MwGetInteger(handle, MwNwidth);
 	int		wh = MwGetInteger(handle, MwNheight);
+	int		wx;
+	int		wy;
 
 	p.x = (ww - WIN_SIZE) / 2;
 	p.y = (wh - WIN_SIZE) / 2;
 
+	wx = wy = 0;
+	if(handle == NULL) wx = wy = MwDEFAULT;
+
 	sh.min_width = sh.max_width = WIN_SIZE;
 	sh.min_height = sh.max_height = WIN_SIZE;
 
-	window = MwVaCreateWidget(MwWindowClass, "main", handle, 0, 0,
+	window = MwVaCreateWidget(MwWindowClass, "main", handle, wx, wy,
 				  WIN_SIZE, WIN_SIZE,
 				  MwNtitle, title,
 				  MwNsizeHints, &sh,
@@ -365,7 +370,7 @@ MwWidget MwColorPicker(MwWidget handle, const char* title) {
 	MwAddTickList(window);
 
 	MwLLBeginStateChange(window->lowlevel);
-	MwLLDetach(window->lowlevel, &p);
+	if(handle != NULL) MwLLDetach(window->lowlevel, &p);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
 	MwLLEndStateChange(window->lowlevel);
 
diff --git a/src/dialog/filechooser.c b/src/dialog/filechooser.c
index fe73d23..5da06e3 100644
--- a/src/dialog/filechooser.c
+++ b/src/dialog/filechooser.c
@@ -465,18 +465,24 @@ MwWidget MwFileChooser(MwWidget handle, const char* title) {
 	filechooser_t* fc = malloc(sizeof(*fc));
 	char*	       path;
 	MwLLPixmap     icon;
+	int	       wx;
+	int	       wy;
 
 	memset(fc, 0, sizeof(*fc));
 
-	w      = 700;
-	h      = w * 2 / 3;
-	window = MwVaCreateWidget(MwWindowClass, "filechooser", handle, 0, 0, w, h,
-				  MwNtitle, title,
-				  NULL);
+	w = 700;
+	h = w * 2 / 3;
 
 	p.x = (ww - w) / 2;
 	p.y = (wh - h) / 2;
 
+	wx = wy = 0;
+	if(handle == NULL) wx = wy = MwDEFAULT;
+
+	window = MwVaCreateWidget(MwWindowClass, "filechooser", handle, wx, wy, w, h,
+				  MwNtitle, title,
+				  NULL);
+
 	fc->history_seek = 0;
 
 	fc->dir	     = MwLoadIcon(window, MwIconDirectory);
@@ -502,7 +508,7 @@ MwWidget MwFileChooser(MwWidget handle, const char* title) {
 	free(path);
 
 	MwLLBeginStateChange(window->lowlevel);
-	MwLLDetach(window->lowlevel, &p);
+	if(handle != NULL) MwLLDetach(window->lowlevel, &p);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
 	MwLLEndStateChange(window->lowlevel);
 
diff --git a/src/dialog/messagebox.c b/src/dialog/messagebox.c
index a4fb0cb..8ef35e2 100644
--- a/src/dialog/messagebox.c
+++ b/src/dialog/messagebox.c
@@ -31,16 +31,21 @@ MwWidget MwMessageBox(MwWidget handle, const char* text, const char* title, unsi
 	int	 w, h;
 	int	 left = 8;
 	int	 th;
-	int	 x  = 0;
-	int	 ww = MwGetInteger(handle, MwNwidth);
-	int	 wh = MwGetInteger(handle, MwNheight);
+	int	 x = 0;
+	int	 wx;
+	int	 wy;
+	int	 ww = handle == NULL ? 0 : MwGetInteger(handle, MwNwidth);
+	int	 wh = handle == NULL ? 0 : MwGetInteger(handle, MwNheight);
 
 	w = 512;
 	h = 32 * 4;
 
+	wx = wy = 0;
+	if(handle == NULL) wx = wy = MwDEFAULT;
+
 	p.x    = (ww - w) / 2;
 	p.y    = (wh - h) / 2;
-	window = MwVaCreateWidget(MwWindowClass, "messagebox", handle, 0, 0, w, h,
+	window = MwVaCreateWidget(MwWindowClass, "messagebox", handle, wx, wy, w, h,
 				  MwNtitle, title,
 				  NULL);
 
@@ -100,7 +105,7 @@ MwWidget MwMessageBox(MwWidget handle, const char* text, const char* title, unsi
 			       NULL);
 
 	MwLLBeginStateChange(window->lowlevel);
-	MwLLDetach(window->lowlevel, &p);
+	if(handle != NULL) MwLLDetach(window->lowlevel, &p);
 	MwLLSetSizeHints(window->lowlevel, w, h, w, h);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
 	MwLLEndStateChange(window->lowlevel);