SHAppBarMessage mit Qt-Creator benutzen

QAppBar.obj:-1: Fehler:LNK2019: Verweis auf nicht aufgelöstes externes Symbol "__imp_SHAppBarMessage" in Funktion ""public: void __cdecl QAppBar::setWidth(int)" (?setWidth@QAppBar@@QEAAXH@Z)".

void QAppBar::setWidth( int w )
{
	// Positioning an appbar is a three-step process:
	// 1) We ask Windows what area is available for appbars by sending it an
	//    ABM_QUERYPOS with a RECT covering the entire desktop; it returns
	//    a modified RECT that excludes the taskbar and other appbars.
	// 2) We come up with a position and size for the appbar (based on
	//    this.edge and this.width), staying inside this RECT, and pass it
	//    to Windows using ABM_SETPOS.
	// 3) On the slim chance that another appbar appears between ABM_QUERYPOS
	//    and ABM_SETPOS, we'll get a modified RECT back.  Use this final
	//    RECT to setGeometry().
	
	// If child widgets have mandated a minimum width on this window, it
	// must be respected
	if( minimumWidth() != 0 ) w = max( w, minimumWidth());

	// Get the area of the entire desktop
	abd.rc.left = abd.rc.top = 0;
	abd.rc.right = GetSystemMetrics( SM_CXSCREEN );
	abd.rc.bottom = GetSystemMetrics( SM_CYSCREEN );
	
	// Let Windows subtract the amount being used by other appbars and the
	// taskbar
    SHAppBarMessage( ABM_QUERYPOS, &abd );
	
	// Position our window on either the left or right side of the screen
	if( abd.uEdge == ABE_LEFT ) abd.rc.right = abd.rc.left + w;
	else abd.rc.left = abd.rc.right - w;
	
	// Pass the final bounding rectangle to the system
	SHAppBarMessage( ABM_SETPOS, &abd );
	
	// Set our actual position based on what came back from ABM_SETPOS
	RECT& rc = abd.rc;
	setGeometry( rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top );
	resizeHandle->setFixedHeight( rc.bottom - rc.top );
}

...
#include <windows.h>
#include <shellapi.h>

LIBS += -L"pfad\zur\datei" -lDATEINAME
# Beispiel mit mylib.lib im Verzeichnis "C:\MyLib":
# LIBS += -L"C:\MyLib" -lmylib